Evidence.

A major murder occurred in Beishan City. Star entrepreneur Long Yun Fei held the murder weapon in his hand and couldn't explain himself. He was taken back to the Criminal Investigation Brigade as a major suspect. Prosecutor Su Qing teamed up with Captain Feng Gang of the Criminal Investigation Brigade to investigate the case. Unexpectedly, during the investigation they accidentally discovered that the case is inextricably linked to the unsolved bones case in the nursing home from several years ago.