The world is submerged, and sea monsters rule the earth. Will Bota and his family ever make it to safety, and escape this aquatic hell? …And who in the world is Kana?!

Only one survivor made it out alive from the school
kidnapping incident that rocked the nation... Gito Kang.
And now he wants revenge. Let the hunt begin.

Taking place on a post-apocalyptic aquatic earth a century after a calamity rose the sea levels, Leviathan follows the adventures of siblings Bota and Rita after their father, Teon Ma, sacrificed his life to save them from a sea monster. The two are soon taken in by a woman called Kana, an acquaintance of their deceased father.

Only one survivor made it out alive from the school kidnapping incident that rocked the nation... Gito Kang. And now he wants revenge. Let the hunt begin.