Bay needs Tank's help when the rivalry between the Carlton and Buckner field hockey teams heats up; Nikki pays a surprise visit to Toby; old relationships prove to be beneficial to Regina; Daphne must choose between Campbell and Jorge.

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.