Switched at Birth, a one-hour scripted drama, tells the story of two teenage girls who discover they were accidentally switched as newborns in the hospital. Bay Kennish grew up in a wealthy family with two parents and a brother, while Daphne Vasquez, who lost her hearing at an early age due to a case of meningitis, grew up with a single mother in a working-class neighborhood. Things come to a dramatic head when both families meet and struggle to learn how to live together for the sake of the girls.
Senior year means big changes for Bay and Daphne, as the Carlton School for the Deaf receives an influx of hearing students who are not happy to be there. Daphne begins working at a free clinic as part of her probation from the Senator Coto blackmail scandal, and bonds with a pre-med student with a spinal injury. Bay is inspired by her art teacher and surprised by her jock classmate, when she takes an art class at a local college. Toby tries to unite a divided Carlton by coaching girls' field hockey, and Kathryn dips her toes into new territory when she makes friends with a gregarious tap dancer.