Twin brothers were separated in the 60s and lived in two different surroundings. One lives with his rich family and becomes musician. The other lives with a prostitute and becomes street wise. A few years later, they reunite in HK.
Tsui Hark let the official credited director Ringo Lam take care of the action scenes. Tsui Hark is in fact involved and interested in developing the comical dimension of the movie by offering Jackie Chan richer and more interesting situations than usual to show his comedian skills. The Tsui Hark/ Lam cocktail works but it remains an amusing movie above all.