John Zimmer, head of a wealthy family, reluctantly agrees to let a young woman stay after she helped his grandmother. However, he denies her immediate start as the night caregiver, imposing a strict probation. He takes her to a locked room where a maid quits in terror upon hearing the violent occupant, Jenny, screaming to be let out. John reveals her test: she has just one day to get Jenny to sleep, or she will be fired with only a day's pay.