In the near future where memories can be accurately deleted, Lin Chen, a top "memory cleaner", makes a living by erasing the pain of others. He is calm and efficient, and never explores the past of his clients to isolate himself from his own emotions. Until a mysterious woman named Su Wan arrived and asked him to delete a memory about the lighthouse. During the operation, Lin Chen was horrified to find that the access rights to this memory were actually bound to his core identification code, and he could not delete it. Why did this memory he never had become an island imprisoning him? In order to find the truth, Lin Chen was forced to step into the sea of oblivion he had built with his own hands, only to find that in the deepest part, buried was the secret he shared with her, as well as a cruel truth that could subvert the entire memory industry.
