The Fosters picks up during summer, a few weeks after the terrible car accident involving Mariana, Jesus and their pregnant biological mother, Ana. As the family deals with the aftermath of the situation, Stef is determined to find the driver responsible for the crash. Callie continues to volunteer at the drop-in center where she meets AJ, a foster teen runaway searching for his older brother. Brandon starts at the Idyllwild Music Program and quickly realizes that he will be faced with serious competition. Meanwhile, Jude tells Connor he prefers to keep their relationship private at school.