A man begins to suspect that his long-distance girlfriend, whom he met online but has never met in person, has been living in the same city the whole time and sets out to find her.

Billy & Billie centers on two young adults as they fall in love. They face the usual barrage of attention from their friends and family, and the normal anxieties that come at the start of a new relationship-all further complicated by the fact that they’re stepbrother and sister.