Traumatized after witnessing her jealous husband kill her adulterous lover and then himself, an unbalanced, nymphomaniac young woman finds herself stalked by an unknown assailant, but she cannot make anyone believe her desperate situation.

Mercedes is a taxi dancer who wants to be an actress. She's involved with the married Harry, who considers himself a respected actor. Ernesto is in love with Mercedes, but he doesn't dance or have money.