In the Eternal City, where tides periodically erase everyone's memories, Imprinter Lin Mo is one of the few who can salvage the forgotten fragments. He uses calmness and professionalism as his armor to reconstruct the past for his clients. When the mysterious woman Evelin broke into his office with a star-shaped pendant and asked him to find a memory about her lover, Lin Mo thought it was just an ordinary business. However, when he dived into that broken memory, what he saw was not a romantic farewell, but a conspiracy related to the survival of the city. The pendant is not a token of love, but a key to the truth. As the next tide approaches, Lin Mo must piece together the tampered truth before it is swallowed up by forgetfulness, and face the past that he least wants to remember.