Kathryn travels to New York to meet with a book editor; Bay suspects that Tank has a crush on her; Daphne becomes worried when she learns more about Sharee's home life; John and Nikki's mother hide bad news from Toby.

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.