Lin Zhou is the memory purifier of the "Forgotten Palace", and his job is to erase painful memories for clients. One day, a mysterious woman asked to delete a memory about a "non-existent color". This seemingly simple business involved him in a huge conspiracy. He found that the memories forgotten by the city had not disappeared, but were constructed into a false "paradise". In order to explore the truth, he must face his dusty past and recover his lost humanity in the ruins of memory.
