Run by former social worker Lap, apm café is frequented by a group of troubled youth, each struggling with problems such as drug addiction and prostitution. One day, thanks to a chance that arises from coincidence, Tinky, one of the more troubled café-goers, decides to steal the diamond ring Triad boss Lung intended to give his wife for their third anniversary. When he discovers the ring is missing, Lung descends into rage. The only person Tinky and her friends can turn to for help is Lap...