In the future city "Fantasy Capital" where technology can accurately peel off and store memories, the top "memory cleaner" Lin Mo makes a living by erasing the pain of others, but he alone cannot face his own dusty past. When a girl named Xiao Tong came to the door with a request to find her missing brother, Lin Mo's peaceful life was completely broken. The only clue is a chip containing broken memories. As the investigation deepened, they not only uncovered a huge conspiracy about memory manipulation, but Lin Mo also discovered that the disappearance of Xiao Tong's brother was inextricably linked to his own blank island of memory. In this ocean of forgetfulness, he must find the truth, otherwise they will both be swallowed up completely.