In a specific time and space, detective Ding Qi accidentally discovered that he had the ability to reverse time and repeat the cycle five times on the same day from time to time. He used this superpower to solve many difficult cases.
One day, a murder notice from suspect X suddenly appeared. Several previous cases of suspected X's perfect committing methods made Ding Qi suspect: X also seems to have the superpower of the time loop.
The investigation team headed by Ding Qi joined the case investigation. During the investigation, Ding Qi discovered that more and more doubts surround a certain genetic research group. As the investigation deepens, more and more people are involved, including people close to Ding Qi.
