Lin Shen, a seemingly gentle urban white-collar worker, leads a regular but empty life. Until one day, he found a strange female body in the apartment, with a bloody dagger in his hand. Fragments of memory and confused identity plunged him into unprecedented fear - he discovered that he had multiple personalities, and one of them, the "Shadow", was actually a serial killer. Police detective captain Lu Chen targeted Lin Shen based on DNA evidence, but during the investigation it was discovered that he had at least seven distinct personalities in his body: a calm "logician", an "actor" who is good at disguise, a keen "empath", and a violent "shadow"... These personalities are independent of each other, but they share the same body and know nothing about each other's crimes.
As murders occur frequently and the police press closer, Lin Shen's characters are forced to join forces: they need to find out the pattern of "Shadow's" crimes within 48 hours to prevent the next killing. Lu Chen had a secret connection with Lin Shen due to an unsolved child abuse case ten years ago. He secretly assisted in the investigation, but in the process he discovered the shocking truth about the birth of "Shadow" - it turned out that when Lin Shen witnessed the tragic death of his parents when he was young, his anger and despair split into this evil personality who uses killing as redemption.
In the game between personalities, the police pursuit, and the fragmented memories, Lin Shen gradually realized that the so-called "redemption" is not only to prevent crime, but also to face childhood trauma and accept all the divided selves. Ultimately, the story leaves readers with an open ending as the "Shadow" prepares to commit the ultimate crime!
