Comeuppance's story revolves around a series of fatal poisonings--in varied settings (including a bar, restaurant and sauna) and from a variety of toxins (most of which is swallowed but one of which is air-borne). The targets are triad kingpins and their minions by a single individual whose identity the police and gangsters, not to mention journalists and the public, seek to know but have difficulty determining.

Cast
Patrick Tam
Jordan Chan
Sunny Chan
Benny Li Shuan Yan
Kuo Chiu Wu