Tricky Brains

Someone has been hired to wreck a father and son, and the plan runs on one lie: that the stranger at their door is family. He is Che Man Kit (Andy Lau), the Tricky Expert, a trickster for hire who makes his living on other people's trust. Wong Jing sets him loose in a household with Koo Jing (Stephen Chow) and Yan Chi (Richard Ng Man-tat), where every day he has to keep up the act is a day he risks becoming part of it.