In a future where the polar ice caps have melted and most of Earth is underwater, a mutated mariner fights starvation and outlaw "smoker," and reluctantly helps a woman and a young girl try to find dry land.
The polar ice caps have melted, and the earth is covered by water. The remaining people travel the seas, in search of survival. Several different societies exist. The Mariner falls from his customary and solitary existence into having to care for a woman and a young girl while being purued by the evil forces of the Deacon.

2500 AD, the Earth's polar ice sheets melted, the world becomes an indoor lake, people living in the water. A lonely sea monk came to the Floating Island A Tuoer exchange of water and tomato seedlings, use a jar of dirt. At that time, the soil is extremely valuable. While he was preparing to leave, he and the island's conflict. The inhabitants of the island he is a long variant of the gills and webbed people, and shut him up. While the islanders to be executed after the sea monk, badu the A Tuoer been attacked by pirates "smokers". Helen and her adopted daughter Yiluo Na was not able to catch up with the elderly Ludwig balloon escape, then rescued by the Sea Walker is about to sink into the mud pool, and asked him to take them to escape A Tuoer. The sea monk through his extraordinary resourcefulness and courage and magical ships sailing out of the A Tuoer, and to coax the heavy "smokers," the fire destroyed their flagship. Bandit chieftain Deakin lost an eye, he vowed to revenge the sea monk. "Smokers" attack A Tuoer in order to find the little girl Yi Luonuo. A marked map of the mysterious legend of the land position in her back stab. To this end, she continued to hunt by Deakin. On the boat sea monk and Helen, the mother and daughter is not friendly. But continue to struggle day and night navigation and "smokers", their relationship gradually becomes unity and harmony among the In order to prove that the land no longer exists, sea monk took Helen to the sea low world, to show her the submerged ancient city. When they surfaced, they were Deacon attacks. Yi Luona been captured, the sailing was also burned. At this time, the paintings of the sea monk never Yiluo Na determine the existence of the land. Sea Walker and Helen Ludwig's balloon rescue. Refused to help As A Tuoer survivors, sea monk can only go alone to the headquarters of smokers - a huge oil tanker wreckage to find the Deacon accounts. After a fierce fighting against brain, sea monk finally destroyed the stronghold of smokers rescued Yiluo Na. The bandit chieftain Deakin has also been that he deserved fate. Finally riding the balloon reached the land in accordance with the map, sea Walker and Helen Yi Luonuo back. However, the sea monk that he does not belong here, and he alone put into the arms of the sea, to sail away.