What will happen if your brain locates a memory that doesn't belong to you? In the near future, a memory-manipulation operation has been popularized across the world. Feng, a prestigious novelist, deletes the memory of his failed marriage. But when he tries to recover the lost memories, he finds himself in the mind of a serial killer. He reaches out to police officer Shen and when they begin to solve the case together, a vast conspiracy surfaces that endangers everyone around them.