Julie is a grief-stricken woman who announces she is leaving the city and buys a random train ticket. She takes a room under an assumed name and erases all trace of her identity. Over the next two years, she appears in the lives of various men and kills them. One night, she crashes an engagement party of a fellow named Bliss. Corey, another guest at the party, tries to romance her, but she deflects his interest, and lures Bliss onto the balcony; when they are alone, she pushes him off and calmly leaves before anyone discovers what happened. Wanger, a police detective who has been following her crimes, is fascinated by the different method each time and her constantly changing appearance. Corey joins him in the investigation as he is determined to finally catch her.