how about...
(insert name of hero) comes home after work to find his family lying almost dead on the floor. So he takes them to hospital to get them treated, but it doesn't look good.
When he gets back home he's cleaning up when he finds a piece of paper that must've been dropped... just says the address of a club is West City.
you can make it a sort of vengance story then, the hero is tracking down these people to bring them to his form of :: cracks knuckles :: justic.
he'll learn that those guys just wanted one of the inventions from the lab in order to find the "dragonballs" and wish themselves for immortality or a new hat (something silly).