A really brutal piece of Hong Kong film from director Tsui Hark. I think it came out in 1980 and it was his third directed film. Anyway, it's an extremely violent story as it centers on three young nihilistic boys who like planting bombs in public areas for kicks. They meet up with some babe who ends up blackmailing them into performing more serious acts of terrorism. Things get really nasty when the four of them steal some money from some ex-CIA mercernaries and then get hunted down.
Most people, including myself, agree that Tsui Hark has never made another movie since that is anywhere near as crazy as this one.