In the series premiere of this drama, a hospital error that involved sending two newborns home with the wrong families is uncovered years later, when the girls are teenagers. The girls went on to lead very different lives: Artistic Bay Kennish (Vanessa Marano) grew up in a world of privilege, while athletic Daphne Vasquez (Katie Lecleric) was raised by a single mother and contracted an illness that left her deaf at a young age.

Kathryn questions why Regina isn't joining in the lawsuit against the hospital. Meanwhile, Daphne goes out with Liam and encounters new difficulties dating a hearing person; and Bay finds a kindred spirit in Ty, who hails from Daphne's old neighborhood.

Bay becomes curious about her birth father. Meanwhile, Kathryn deals with her nosy neighbors; and John takes an interest in Daphne's basketball games and meets Melody (Marlee Matlin), a friend of Regina's who works at Daphne's school.

Kathryn hosts a fund-raiser for Buckner Hall, and Toby's band provides the evening's entertainment. Meanwhile, Daphne is crushed to find out that she's been dating Bay's ex-boyfriend; and John and Melody's new friendship makes Kathryn uneasy.

Kathryn and John insist on having Ty over for dinner after they learn that Bay has been seeing him secretly. Elsewhere, Toby asks Daphne and Emmett to help him win a poker game, which puts Daphne in an uncomfortable position.

Daphne is unsure about her romance with Wilke, and then she meets a confrontational new student at school. Meanwhile, Emmett isn't happy to learn that Bay is still in contact with Ty, who may have been injured in Afghanistan.

Regina returns from rehab early to spend time with Daphne, who has bonded with her biological parents while Regina was away. Meanwhile, Bay runs into Ty; Travis proves to be a bad influence on Emmett; and Kathryn and Nikki don't see eye to eye.

Bay discovers some surprising info about Ty's time in the military as she reconnects with him. Meanwhile, Toby and Travis covet the same position at John's car wash; and Kathryn and Daphne have trouble accepting Bay's desire to stay with Regina.

Angelo becomes a member of the country club. Meanwhile, Regina begins a new job; Kathryn's position as a senator's wife leads her to have an awkward encounter; Daphne is unsure about Jace's feelings; and Bay uncovers new info about Ty and Mary Beth.

The Kennishes adapt to change in the wake of a family emergency. Meanwhile, Daphne's family obligations interfere with her time with Jace; Angelo tries to increase business for Regina; and Bay feels uneasy when she meets an Army medic who served with Ty.

Angelo's relationship with Bay is tested as he fights for custody of his infant daughter. Elsewhere, Daphne and Jace stumble onto a possible political scandal; Nikki learns that Toby's reconnected with Simone; and Emmett sets up a blind date for his mom.

Bay organizes Deaf Day at the amusement park, and Emmett assists her with a special movie screening. Meanwhile, Daphne's hit with a surprise when she runs into Chef Jeff; and Toby tries to help Nikki deal with a dark part of her family history.

Ty and Bay embark on a camping trip. Elsewhere, John continues to show Regina his gratitude; Nikki questions her mother about her father's past; and Parker's distressing news causes Daphne to become more frustrated with Jace.

Bay and Daphne host a bachelorette party for Nikki. Meanwhile, Toby's bachelor party goes off course because of Simone; Jennice makes some surprising requests for the wedding; and an altered living arrangement has Angelo and Regina reexamining things.

Toby prepares for his wedding, and his parents contemplate being truthful with him. Meanwhile, Bay seeks a long-distance romance with Ty in the face of his redeployment; and Daphne is forced to own up to her mistakes.