Guo Baifei, Jiang Xiwen, and Liu Li had a close relationship with Superintendent Luo Youbang and his four apprentices when they first entered the school over ten years ago. Three years ago, during an operation, Bang was shot dead by bandits, and Li was severely injured and fell into a coma. Wen blamed Fei for this, and the friends parted ways from that point on. A dismemberment murder case involving a young woman arose in the city, and the victim was linked to a human trafficking group. Wen, who was in the Intelligence Division, was in charge of investigating the group's crimes, while Fei from the Major Crimes Unit was responsible for tracking down the murderer, dispatching trainee inspector Wen Jiali to infiltrate the criminal organization. Fei and Wen received mysterious text messages around the same time, hinting at clues related to the murder case. Their superiors then merged both teams to establish the Mysterious Message Intelligence Bureau (ASIB). ASIB is led by Fei and Wen as they work together to decode these enigmatic messages that seem to come from the future and solve the strange murder case. The messages are mysterious and inexplicable by science. Who exactly sent the messages? Are they from someone in the future? Or from an unknown natural force? Is the sender a friend or foe?
