After a night of drinking with her friend Tank, Bay wakes to find that she doesn't remember all the details of the night. She tries to piece together the events of the evening, but as she speaks with different people about the situation, what really happened may not be so clear. Professor Marillo invites Daphne to a small gathering of students at her home. Meanwhile, Lily offers to help Toby while he figures out his finances.
Switched at Birth 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 poor 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.