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.
A policeman forsakes his dream of world travel to care for a mentally impaired brother, who is later kidnapped by gangsters.
In 1937 Shanghai, a soon-to-depart soldier meets a young woman under a bridge during a Japanese air raid. They vow to meet after the war ends, but they don't know each other's name or face. Ten years later, the young woman, a nightclub singer, takes in a naive girl fresh from the country. The country girl falls in love with the would-be song-writer upstairs who, unbeknownst to the singer, is none other than the soldier from the bridge.
