In a future city soaked in neon and rain, Ling Zhou, a "memory restorer" who has lost his memory, makes a living by sneaking into other people's memories. He can repair all the broken memories in the world, but he can only find his own past. A mysterious commission led him to a woman named "tide". The memory crystal she brought was not for repair, but for complete erasure. When Ling Zhou sank into the sea of memories that had been deliberately forgotten, he was horrified to find that he was not only a bystander, but also the protagonist. The lighthouse on the isolated island, the unfulfilled promise, and the invisible shadow chasing them all point to a buried truth. He must find himself in the maze of memory, otherwise, both of them will be completely swallowed by the deep sea called "Forgotten".
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