There is a new girl at Billie's school, and Billie takes it upon herself to show her around, teach her the Biscuit Laws, and remind her that yes, two women can get married (after all, Billie's mums' wedding is the event of the year). But then suspicion sets in. The new girl seems very close to Billie's best friend Layla. And doesn't she know a little too much about the latest big school heist - the theft of Mrs Robinson's purse?