In this grim thriller, a disco hostess finds herself threatened by an obscene phone caller. The club stand-up comic is an undercover cop who gets interested in the case. He begins acting so strangely, that the hostess begins to suspect him of the crime. She later befriends the club busboy without realizing that he is not only the caller, he is also stalking her. The calls keep coming and the woman gets really scared. She moves in with the comic and his family. The owner of the club, a lesbian, visits the woman one night. The stalker mistakes her for the hostess and rapes and kills her. This is particularly devastating for the cop's wife, who had been raped once. Meanwhile the hostess remains unaware of her new friend's dangerous side and gives him a dance lesson at the club. He loses all control and attacks her after revealing his true identity. He then leaves the club. Fortunately, the police are hot on his tail. A shoot out ensues, and the psycho sex-killer is killed.