When "Zero" wakes up on the gray beach covered with memory fragments, he is already a drifter in the sea of oblivion, and his only identity is a cold prism held tightly in his hand. On this isolated island called "Guixu", people make a living by picking up the tide of memories, but they must always beware of the "Whispering Fog" that devours the mind. The mysterious guide "tide" tells him that the only rule on the island is not to pursue a past that does not belong to you. But when the prism in his hand resonates with a specific memory, "Zero" is forced to embark on a dangerous journey to find himself, and the end of this road may be a crueler truth than forgetfulness.
