A female college student falls from a building in a bizarre manner. Cheng Rui, the deputy captain of the Criminal Investigation Detachment who has just been transferred to the post, is assigned by the deputy director Du Yulin to investigate the hidden story behind the case.

• Richard Ng Man-Tat
• Wang Jinsong
• Zhou Yiwei
• Julian Cheung Chi-Lam
• Eric Tsang Chi-Wai
• Wang Xun
• Shao Bing
• Ray Lui