When Chen Mo woke up on the beach of an unknown island, he lost all his memory, and all that was left in the world was a gray sea and a rusty lighthouse. The mysterious woman "Zero" told him that this island was built by his memory, and the "Sea of Forgotten" was constantly swallowing it. In order to find himself, Chen Mo must reach the top of the lighthouse and retrieve his "core memory" before the island sinks completely. However, every time he picks up a piece of memory, he has to face a painful past. He gradually discovers that the truth he wants to find most may be the nightmare he desperately wants to forget. In this race against oblivion, should he choose to embrace the cruel truth or sink into a false peace?
