Bay Kennish (Vanessa Marano) is an artistic teenager being raised by her stay-at-home mom Kathryn (Lea Thompson) and former professional baseball player father John (D. W. Moffett), in a wealthy neighborhood along with her brother Toby (Lucas Grabeel). After studying blood types in school, Bay begins to investigate why her blood type does not match her parents. When the family confirms Bay is not biologically related, they discover the hospital mistakenly switched her with another newborn. Daphne Vasquez (Katie Leclerc), a deaf teen living with her struggling single mother Regina (Constance Marie) and grandmother in a working class neighborhood. A case of meningitis caused Daphne to lose her hearing as a child, so she attends a deaf and hard of hearing school where she plays basketball. When the two families meet, the girls toil with their identities as Bay relates to her birth mother's artistic abilities and Daphne is drawn to John's athletic skills. The Kennishes learn that Regina is facing financial woes and propose the Vasquezes move into their guest home. The new living situation forces the girls, along with both families, to understand their differences and embrace their similarities.[3] Deaf advocate Marlee Matlin[4] plays a friend of Regina's and the mother of Emmett (Sean Berdy), Daphne's best friend and a deaf schoolmat