Callie, a 16-year-old girl fresh out of juvenile hall, goes to live in the care of Lena and her partner Stef and their kids.

Callie is accused of selling pills around school, and Lena and Stef decide not to punish Brandon which causes tension among the parents.

Mike asks Brandon to move in with him, and Jesus and Lexi continue to keep their relationship a secret from Mariana.

Everyone is celebrating Mariana's quinceanera, and the secret Jesus has been hiding comes to light, which causes tension between Mariana and Lexi.

Brandon has an audition for a sought after piano coach, while Jesus is invited to a church camp.

Stef and Lena have dinner with Lena's ex.

Mariana and Jesus deal with the repercussions of their actions.

The Fosters are getting married, but Stef is not as involved as a stressed out Lena would like.

Callie meets a woman who works in the foster care system; Brandon reveals why Callie ran away.

Callie hopes to earn back the trust of her loved ones; Stef is called to testify in Mike's case.

Mariana and Jesus worry about dates as the Winter Ball approaches; Zac's mother visits Lena.

Callie is surprised to find that Jude is spending time with Jack, a quirky foster teen they met at a foster youth event. Brandon and Mat decide to write a Romeo & Juliet rock musical as their senior thesis project, but they disagree over who should play Juliet. Meanwhile, Jesus asks Ana about the identity of his and Mariana's birth father.

Brandon and Grace plan the ultimate senior prank which ends up going a little too far. Mariana and Mat make a huge decision about the future of their relationship.

It’s graduation day for Callie and Brandon, but after some shocking news, the family wonders whether they will make it to the ceremony.