The Ocean Era. Ninety-nine Eastern Realm contestants have fallen, pushing their side to defeat. The last contestant, Ethan Reed, a time-traveler, possesses a divine decomposition and evolution skill, converting sea items into resources. He hunts sea monsters, acquires resources, evolving a wreck into the Ghost Bone Raft. As other contestants plot to besiege him and mutant sea beasts appear, Ethan crushes rivals with biological vehicles, building his massive sea biological warship.