In the near future where memories can be accurately removed, Lin Mo, a top memory restorer, can repair all the broken memories in the world, but he can't piece together the huge void in his heart. As a restorer, he wanders through the ruins of other people's memories, like a lonely scavenger. Until a mysterious woman Su Wan appeared with an encrypted memory chip. The fragments of the car accident on a rainy night in the chip surprisingly overlapped with his nightmare every night. In order to explore the truth, Lin Mo embarked on a dangerous journey against the "Sea of Oblivion" - the giant tower that erases all pain. He must make a choice between retrieving the pain of the past and maintaining the current peace, and the price of the truth is far heavier than he imagined.