Stef Foster and Lena Adams' family of adopted and biological children grows when a hardened teen who has spent her life in and out of foster homes joins the mix.

Mike becomes upset when Lena and Stef decide not to punish Brandon; Jesus gets into a fight at school after he stops taking his medication; making living space for Callie and Jude proves difficult for the Foster teens.

Mike asks Brandon to move in with him; Mariana disapproves of Jesus and Lexi's relationship; a school assignment causes Callie to revisit her own dark secrets.

Mariana asks Callie to be in her court at her quinceanera; Lexi wants to come clean to Mariana about her relationship with Jesus; the arrival of Lena's mother creates friction.

Jesus and Lexi take things further than they planned; Brandon has reservations about Callie dating Wyatt; Stef and Lena realize their lives lack romance; Mariana tries to fit in with the cool crowd.

The Fosters host a dinner attended by Lexi's protective parents and Stef's conservative father; Callie meets someone with a connection to her past; Mike arrives late to transport Brandon to an important music audition.