When Nick and Jan move into their new apartment house in San Francisco, the crazy landlady upstairs informs them about a girl who used to live there in the 1920s: a brash young party girl named Maxie, who died in a car crash the morning before her massive audition for a Hollywood studio. Merry mayhem is guaranteed when Maxie's ghost, who hasn't left the house, takes over Jan's body and plans to rekindle her film career - but then falls head-over-heels in love with Nick. What he doesn't at first realise is that the woman making hasty advances on him is Maxie, and the only way she's going to leave Jan's body is if she gets that audition.