To Err Is Humane

Biu and Ting are two simple and honest guys, working in a jewelry store owned by cunning Ms Chou, who keeps picking on Ting. The usually silent Ting loses his cool when he is blamed for the theft. In a fit of rage, he plans to kidnap Ms Chou for ransom, along with his friend Biu. However, they end up kidnapping the wrong girl. To their utter shock, the girl turns out to be Mr Chou's illegitimate daughter. What happens next?
(Source:
IMDB)