Callie returns to Girls United and something goes terribly wrong. Also, it is date night at the Fosters house. Stef receives a letter from Ana.

Lena’s ex-girlfriend comes to visit and reveals a secret. Callie wants to help Talya when an embarrassing video of her is circulating around the school.

Callie’s encounter with her father leaves her confused. Meanwhile, Lena and Stef come to a major decision, Jesus struggles with his ADHD medication, and Mariana gets an invitation from Zac’s mom.

All the kids manage to go to the same Mexican Street festival. Callie has a relapse of her panic attacks as Ana tries to correct her past mistakes with help from Mike.

Stef has been shot and it’s not a minor wound. Flashbacks are used to tell the history of how Lena and Stef met and how the family was formed.

The high school’s Winter Ball is coming and Jesus and Mariana worry about their dates, Callie is nominated for Winter Queen, and Ana comes back with bad news.

It’s Stef and Lena’s wedding, but Frank won’t show up. Lena’s mother, Dana, and Stef’s mother, Sharon, argue about the wedding.