In Xinhai City, memories can be precisely stripped, stored and forgotten. The top "memory adjustment lawyer" Lin Mo uses his calm and precise skills to erase the painful past for his clients, but he himself lives in a blank. One day, a mysterious noblewoman Su Wanqing came with a silver locket that could not be opened, and asked him to retrieve a completely sealed memory - the memory of a man. This bizarre commission dragged Lin Mo into a whirlpool of data and dusty past events. When he dived into the deepest "Sea of Oblivion" in human consciousness, he discovered that what he was looking for was not only the client's past, but also his own tampered identity and the shocking secret hidden under the island of memory.