Cuando el profesor Lionel Carpenter tiene, por fin, su primera experiencia sexual, algo extraño e inesperado ocurre: se queda embarazado. Ahora todo el mundo quiere sacar provecho de la situación, incluso el mismísimo presidente.
Tracy Fleming is a widowed police officer, with a young son, who has risen to the role of plainclothes operative. After six women have been raped and killed, Fleming agrees to go undercover in an effort to make herself a target for the killer. The climax places her in a life-and-death struggle with the killer.
