Model Starlet, leads a double life; at night, she becomes Sherry, a Times Square prostitute, in order to search for her brother's killer. He was a marine who had been involved in a game of hot potato with a live hand-grenade on a boat returning from Lebanon. The game had ended tragically when the grenade went off, killing three men and injuring six others, castrating one of them. Now someone is stalking New York and stabbing ex-marines to death, leaving fake hand-grenades between their legs after castrating them. Hard-boiled policeman Flanigan thinks Starlet is putting herself in too much danger, so he intentionally exposes her double identity, then poses as her to catch the real killer.

Michel (David D' Ingeo) knows Luna (Deborah Cali), an aspiring dancer, and it is love at first sight. But the boy is also attracted by her mother (Valentine Demy), which gives more time to the advances of the young. Luna, once discovered everything, despairs and runs away. Then, in revenge, he grants the father of Michel, her choreographer. Eventually, though, Michel manages to win her back.