Callie thinks she's celebrating her 17th birthday with just the family, but Jude surprises her with a house party. Jude's surprise risks exposing both Callie's and Mariana's secrets when he innocently invites Rafael and Wyatt to attend. Meanwhile, Brandon's suspicions about AJ's behavior come to a head, and Mariana and Callie decide to buy a car together without telling their moms.
