A martial arts instructor working at a police academy gets imprisoned after killing a man by accident. But when a vicious killer starts targeting martial arts masters, the instructor offers to help the police in return for his freedom.

In this prequel to the original, a bloody power struggle among the Triads coincides with the 1997 handover of Hong Kong, setting up the events of the first film.

For never-do-well compulsive gambler Fong, there's only one thing more fearsome than debtors at his doorstep - having to coax a crying baby. But what if the baby becomes his golden goose to fend off his debtors? Can he overcome his phobia of diapers, milk bottles, and cloying lullabies?

Adapted from a sensational real-life case in 2013, the intricate story begins when a young man partners with his friend to murder and dismember his parents. Pleading not guilty, the defense attorneys soon turn on each other, as the defendants play the devil and idiot game. Meanwhile, heated debates emerge inside the jury room, where nine jurors grapple with the truth.