Real Awakening. Book 4

The case of number Thirteen.
Six months ago, a series of brutal murders occurred. The perpetrator was
caught and sent to prison. However, the case could not be concluded — three detectives, under mysterious circumstances, became victims of inexplicable incidents.
E Xiao and Su Mu take on the challenge of solving this difficult case. They set out
to meet the murderer, but it turns out that he remembers nothing or… is he pretending not to remember? During the investigation, the police discover a sheet with mysterious letters and numbers from the laboratory and learn about the mysterious disappearances of children.
Now they need to uncover not only the motives of the criminal but also unravel the larger mystery of the secret scientific institute.