Yang Luo, a trainee forensic doctor who was accidentally bound to the "Time and Space Murder Chasing System", was involved in a serial murder case that spanned thirty parallel worlds. The victims in each world have the same DNA, and the system countdown shows that if the truth cannot be cracked within 99 days, all parallel time and space will collapse at the same time. Yang Luo must use the "memory retrospection" ability given by the system to travel between police stations, laboratories, and gangs in different worlds, racing against time. As the case deepens, he discovers that he is actually the "perfect container" for the murderer, and the "Eternal Night Organization" that his mother repeatedly whispered before her death is the core of this time and space crisis... (Integrating the parallel world criminal investigation setting of "Replacement of Evil", adding the folk suspense elements of "The Body Raider", highlighting the urgency of the system countdown)
