Day and Night Prisoner

Ten years ago, an unsolved case occurred in Niguang City: at three o'clock in the morning, the bell rang, and five dead people with unrelated identities died mysteriously one after another. The case has not yet been solved and the files have been sealed, making it the biggest mystery of the Niguang City Police Department. Ten years later, the silent bell rang again. Forensic doctor Xu Nian received a mysterious text message: "I know your 17 years old." At the same time, a woman died mysteriously in the east of the city, but the deceased's last text message pointed to Xu Nian's past. As the investigation deepens, more mysteries emerge: the origin of the bells, the common denominators of the deceased, the huge hidden conspiracy, and the forgotten memories of Xu Nian when he was 17 years old. As time passed, the truth gradually emerged, but Xu Nian discovered that he might have become a prisoner in the mystery, and the low bell was ringing his fate step by step. Clear away the fog and unlock the secret behind the bell; battle wits and brains, and fall into the abyss of suspense step by step. Between day and night, can you escape the judgment of fate?