The movie begins in a world where the
melting of polar ice has resulted in all
continents becoming submerged in water, forcing
humans to adapt to their new environment.
They now live in rugged, floating communities
known as atolls, feeding on seafood and living
off trades. Plants, dirt, and soil cost
more than gold and people use their urine
for cultivation due to lack of fresh water.
Although the world has turned into an endless
giant ocean, many believe there exists dryland
somewhere. Several groups of people are looking
for the said magical place in hopes of living a
better life but no one has been successful yet.
We are introduced to a man named Mariner,
who lives in a ramshackle boat that appears
to be made of scrap. He is seen urinating in a
small vessel and then pouring his urine into a
machine that converts it into drinkable water.
In the boat, he has planted a lime tree, a rare
commodity in the world with no land. Mariner
does fishing and collects reusable trash from
the ocean for his survival. One afternoon, after a
dive, he notices another boat approaching him.
The man on the other boat tells Mariner about
an atoll, where he obtained various supplies.
He wants to trade them but when Mariner
learns that the man wants nothing in return,
he begins to doubt him. He soon realizes that the
man has stolen all of his limes. Simultaneously,
a group of smokers arrives in their jet skies
and begins attacking them. Despite the fact
that Mariner’s boat is made up of scrap, it
is fast, and he is able to escape, whereas
the other man is apprehended by the smokers.
Following this, Mariner arrives at the atoll,
a floating city surrounded by high metal
walls. At the gate, he says he’s there to
trade his belongings. Upon heading inside, he
reveals that he has some genuine dirt to trade,
which is extremely rare. Seeing this,
the people of Atoll give him 124 chits
in exchange for a jar of dirt. He then uses
the same chits to purchase a tomato plant
and some other scraps from a woman named .
After the trade, he is returning back to his
boat when a family approaches him and asks
him to impregnate their daughter, but he
refuses to do so. This makes them suspicious
of his intentions, and they order the locals
to stop him. After he is apprehended, the locals
discover Mariner to be a mutant with gills behind
his ears and webbed feet. Mariner tries to fight
back but is captured under a fishing net.
Later that night, Helen meets with an elderly
man named Gregor and inquires as to when they
can depart for dry land. Gregor informs that
the direction for the dry land is tattooed on
the back of a little girl named Enola, but he
does not understand it. Gregor then considers
asking Mariner about it, who is imprisoned inside
a cage. Following this, he approaches Mariner and
inquires about the mutation, but Mariner appears
to be dismissive of him. Only when Gregor shows
the picture of the tattoo, does Mariner seem
interested. In exchange for the information,
Mariner wants him to open the cage,
but Gregor is not allowed to do so.
The next day, the local people decide to drown
Mariner in the swamp pit by lowering the cage.
Simultaneously, an army of Smokers led by Deacon
arrives to attack Atoll. They are also looking
for the mythical dryland and want to get to the
little girl who holds the secret to its path.
Soon after, the smokers encircle Atoll and begin
shooting with large machine guns, killing several
Atoll residents. Eventually, the smokers with the
jet skies enter the building via self-built ramps.
Inside, Gregor fills a balloon and inadvertently
flies away, abandoning Helen and Enola. Meanwhile,
Mariner tries to break free, but his cage
collapses, causing it to shrink gradually.
Helen notices this and rushes to his aid.
She agrees to assist him only if he takes her
and Enola with him, to which he agrees.
Following this, he tells Helen and Enola to
open the gate until he starts his boat.
Unfortunately, the gate becomes stuck,
so Mariner uses the ship’s rigging to fly up,
open the gate, and jump back to the boat. Enola
and Helen also board the boat and make their way
out of Atoll. On the other hand, the smoker with
machine guns continues to fire in an undetermined
direction, causing their leader Deacon’s boat to
explode. However, Deacon dives into the sea
at that precise moment, saving his life.
After the battle, the smokers continue looking
for Enola, having found that she has the tattoo of
the way to dry land. The smokers bind one of the
locals and inquire about Enola. Fearful of death,
the man reveals everything he knows, but he is
killed anyway. As they sail away, Helen asks
Mariner if he knows how to get to dry land to
which he responds in the affirmative. However,
he advises her to throw Enola away before going
there because they have limited food and water.
Helem tries to persuade him not to do so. She
even offers herself in turn for the little
girl’s life, but Mariner dismisses her.
After a while, Mariner notices Enola drawing on
his boat, which irritates him, and he throws her
into the water. Helen panics, knowing that Enola
is unable to swim, so she dives in to save her.
Mariner appears to abandon the two in the water,
but he later returns to pick them up.
As soon as they get on the boat, the smokers
arrive on the plane and begin shooting at them.
While Mariner goes down to retrieve his weapon,
Helen rushes towards the large spear gun and
fires at it without Mariner’s permission.
As a result, the plane is now
tethered to the boat by the metal rope
and begins circling it, tangling it in a web.
When Mariner notices this, he rushes up to cut the
rope and untangle the boat, while the smokers
do the same. A few moments later, the smokers
are able to shoot the rope and fly away whereas
Mariner swings off and lands on the water. He
is furious at Helen for destroying the boat, so
he cuts both her and Enola’s hair as punishment.
On the other hand, Deacon guesses their
location and deploys his men to find Enola.
While sailing, they come across a drifter
who admits to having some important papers
and offers to trade them in exchange for
Helen. Helen refuses, but Mariner agrees. The
drifter takes Helen to his boat, while Mariner
quickly examines the paper and discovers that
it is useless. He quickly rushes into the
drifter’s boat and cancels the deal. This
enrages the drifter, who decides to stab Mariner.
A fight begins, and Mariner kills the drifter.
In the next scene, Mariner demonstrates how he
does fishing. He dives into the water as bait,
and soon a massive mutated fish appears. He then
uses his weapon to kill the fish and prepares
food for everyone. Mariner was rude to them at
first, but now he appears to be nice to them
as he starts talking to Enola. He allows Enola
to draw with a colored pencil and also teaches
her how to swim. Helen appears concerned as
she witnesses their bond grow stronger.
After a while, they come across the barter
outpost and notice some men waving at them.
Mariner is suspicious, so he looks beneath
the water and discovers the smokers waiting
for them. He immediately turns the boat around
in order to flee, but the smokers pursue them.
They somehow manage to avoid the attacks of the
smokers. Mariner then deploys the extra sails as
parachutes, allowing them to flee faster.
After they are safe, Mariner forces Helen to
reveal the truth about Enola’s tattoo so she
discloses that the tattoo is the path to dry land.
When Mariner hears this, he claims that dry
land is a myth, but she does not believe him.
As a result, he decides to show her. He places
Helen inside a large bubble and submerges her.
He can breathe through his gills, so he takes her
deep into the ocean and shows her the past world,
which is completely covered
in water, which shocks her.
Meanwhile, Enola is waiting for them in the
boat when she notices something in the water
and quickly hides. When Mariner and Helen swim
to the surface, they discover that they have been
apprehended by the smokers. Deacon coerces them
into telling him about Enola, but they both remain
silent. Deacon then shoots at the air, pretending
to kill them. As a result, Enola comes out,
being concerned, but she is quickly captured by
the smokers. Deacon orders his men to kill Mariner
and Helen, but the two escape by diving into the
water. Underwater, Mariner uses his gills to help
Helen breathe until the smokers leave. After
some time, they return to the surface and
discover that their boat has been destroyed.
On the other hand, Deacon pretends to be nice
to Enola and inquires about the tattoo behind her
back, but she remains silent. He then offers her
some colored pencils and asks her again, but she
doesn’t say anything. Back at the destroyed boat,
Mariner and Helen are hopeless. Helen
inquires as to why he did not accept
her when she offered herself, to which he
responds that she did not like him then.
The answer touches her heart and she kisses him
before the two of them make love on the boat.
The following day, Mariner attempts to repair
the boat, but they discover Gregor in his hot air
balloon. Gregor then takes them to the boat where
the survivors of Atoll are staying. At night, they
talk about going on a search for dry land, but
the people aren’t ready to look for Enola because
it’s dangerous to face the smokers. Mariner then
decides to go on his own in search of the little
girl. After a while, he arrives at the smokers’
ship and enters it, killing the smokers one after
another. Meanwhile, Deacon gathers the smokers
and lies to them, claiming to have discovered
the way to dry land. He orders everyone to begin
rowing, thereby propelling the ship forward.
As the men begin to row, Mariner approaches Deacon
alone and asks to free Enola. When Deacon refuses,
Mariner threatens to drop the flame into the
oil reserve, which will cause the entire ship
to explode. Deacon does not believe he will
act irrationally, but Mariner drops the flame,
causing a massive explosion. Deacon then flees
with the little girl before Mariner reaches the
top at the podium and notices him on the plane.
He immediately fires a spear gun at the ship’s
fence and ziplines down. Following that, he uses
the metal rope to create a barrier, causing the
plane to crash before taking off. Fortunately,
Enola is unharmed, and the two of them embrace.
However, the ship begins to break down, leaving
them with no way to escape. Fortunately, Helen,
Gregor, and an Atoll resident arrive at the same
time on the hot air balloon. Before the ship
breaks down, they drop the rope and pull Mariner
and Enola up. But, Deacon grabs the rope and
climbs up as well. When Helen notices this, she
throws a heavy object at him and Enola kicks him,
causing him to fall into the ocean.
Mariner and Helen make it to the hot air balloon,
but a persistent Deacon jumps on a jet
ski and shoots at the hot air balloon,
causing Enola to fall into the water. Deacon
orders his men to capture the little girl,
but Mariner is quick to respond. He grabs the
rope and ties it around his leg before leaping
from the hot air balloon. He successfully
grabs Enola and springs back up just in time,
causing the jet skies to collide and explode.
Finally, they reach the hot air balloon safely.
This time, Gregor is able to understand Enola’s
tattoo and head in the direction of dry land.
After several days of flight, they spot a bird
on their hot air balloon. When they look further,
they are astounded to see land for the first time
in their lives. They are overjoyed to finally be
there and begin exploring the area. A few moments
later, they notice a small hut and enter it to
find a couple’s bones lying together. They also
discover the map drawing, which is similar to the
one on Enola’s back. That hut is revealed
to be owned by Enola’s family. Her family
appears to have sent her away in the hope that
she will bring more people to the dry land.
Meanwhile, Mariner finds the land to be
uncomfortable and feels that he belongs in
the sea. He then approaches Enola and informs
her that he is leaving, which saddens her.
He tells her that he isn’t born for dry land,
but she tries to assure him that he will adapt.
However, he doesn’t change his mind and
bids Enola and Helen a final goodbye
before departing. In the final scene, Helen and
Enola watch him sailing away from a cliff.
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