Lin Yi, a sophomore at Jiangcheng No. 2 Middle School, accidentally fell from a building and became a vegetative state. However, he awakened the SSS-level magical skill - time regression! His body was in a coma, but his consciousness was forced into a time copy of a mysterious and tragic death of a school girl. He was forced to play the role of a passerby, a gangster, or even a real murderer, and he went through endless levels in an infinite reincarnation. Every time he dies or completes a task, a hidden clue will be revealed: [The last number she dialed before she died was...]. Relying on the puzzle-like entries, he transformed into a ghost detective in reality, solving cases from a distance and shocking the whole city.
