It's a big day for Callie as her future with the Fosters hinges on the revelation that Donald is not her birth father. What happens next could threaten to separate Callie and Jude once again. Brandon struggles to recover and come to terms with his guilt over sleeping with Dani, and big questions still remain about what Mike was up to the night Ana disappeared. Meanwhile, Jesus and Emma's relationship impacts Emma's standing with her teammates, which causes tension between them. Mariana has made a big change, much to Stef's dismay.

Stef and Lena go on a babymoon, leaving Brandon and Callie in charge of the house. Brandon's bandmates pressure him into having a few friends over to hear their new sound, but when Mariana and Jesus find out, the night turns into an all-out rager. Determined to follow Stef and Lena's rules, Callie tries to police the party but fails miserably. Jude finds himself in an awkward game of spin the bottle. Meanwhile, Lena tries to reconnect with Stef, who is finding it hard to relax on their weekend getaway.