When the family takes a vested interest in AJ (guest star Tom Williamson, "Switched at Birth"), Callie has doubts about whether she can trust him. Meanwhile, Jude has trouble moving on from the trauma of the shooting incident.
Callie convinces Brandon to head out on a mysterious trip that brings them to Mexico. Stef and Lena discover an empty pregnancy test box in the trash and wonder if someone in the house is worried they are pregnant.
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.
Stef and Lena hesitate to give their blessing when Mariana's biological grandfather tells her she must be baptized in order to be her new half-sister Isabella's godmother.
When Rita's daughter shows up unexpectedly, Callie sees a different side of Rita and learns the reason behind their strained relationship. Stef discovers a new lead in the hit-and-run case. Brandon confronts his moms about the tensions in the house.
Callie is now officially adopted into the Adams Foster family and must put aside any romantic feelings for Brandon. She does so by throwing herself into her "Fost and Found" website, even drawing the interest of an investor.
Brandon is upset when he learns that his shared secret with Callie is in jeopardy. Lena and Stef's mother, Sharon, disagrees over how Stef should handle her diagnosis.
While Stef recovers from surgery, she and Lena grow concerned when they find out Justina wants Callie to support a legislation that they know nothing about.
Stef begins teaching a class in the police department's youth outreach program, but she soon realizes that it is not as easy as she thought it would be.
Jesus is upset after his plans for a low key birthday are supplanted by Mariana, who plans a huge dance party instead. Jude is excited by the prospect of a weekend visit with Connor.
Brandon plays referee between the two stars of his show, Mariana and Mat. Callie testifies on behalf of Daphne in an effort to help her get her daughter back.
As Brandon debuts his "Romeo and Juliet" rock musical, moments in the production are hitting home for the Adams Foster family, causing them to look back at recent events.
A tragic loss brings the family together. Despite Callie's hesitation, Justina moves forward with the Fost and Found launch party. Brandon tells his moms that Cortney has a son.