Two Hong Kong cops are sent to Tokyo to catch an ex-cop who stole a large amount of money in diamonds. After one is captured by the Ninja-gang protecting the rogue cop, the other one gets his old Orphanage gang, dubbed the "Five Lucky Stars," to help him. They don't like this much, but they do it.
[ Trailer ] ็ฆๆ้ซ็ ง ( My Lucky Stars ) - Restored Version
My Lucky Stars Trailer