Lan Shaoping, the captain of the criminal police, was dismissed for a work error. Lan Shaoping, who was dismissed, found that the champion work of the "Crime Recording Exhibition" showed a premeditated murder, but other criminal police officers disagreed with this statement. Author Jin Youkun said it was her accidental. Breaking through many obstacles, Lan Shaoping's investigation made progress. He found a murder weapon in the Jin family, but it was not until the appearance of Feng Dalco, who secretly fell in love with Jin Youkun, that the truth of the case was revealed...