On an a spring night in 1973, co-ed Susan and her date find themselves in a Victorian mansion outside of Boston, guests of the elderly caretaker couple. Hearing the tragic tale of the dying estate owner, Susan agrees to impersonate Veronica, a long-dead sister she apparently resembles. Soon, Susan discovers herself locked in Veronica's room, pretending to be Veronica… and learns too late why talking to strangers can be dangerous.