After Loop

Shen Nan, who was trapped in a time loop, committed a murder while suffering from the depression of being unable to break the loop. Unexpectedly, the time loop was unknowingly broken, and the murder charge became an established fact. Just when he was about to be arrested, a strange man helped him take the blame. During the investigation, he discovered a shocking truth... Who is this man? What kind of complex truth is hidden behind the incident?