A coming-of-age biographical film about the 1970s teenage all-girl rock band The Runaways. The relationship between band members Cherie Currie and Joan Jett is also explored.

A young woman quits her teaching job to be a private tutor (governess) for a wealthy young heiress who witnessed her parent's tragic death. Shortly after arriving, the girl's degenerate brother is sent home from his boarding school. The tutor has some strange, unexplainable experiences in the house and begins to suspect there is more to their story.