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.

Regina pleads with Daphne to keep her secret about what was in the guitar case, but soon the hospital board reveals info that forces Regina to spill everything. Meanwhile, Bay and Emmett's bond intensifies.

Bay is shocked to meet her biological father (Gilles Marini) at her school's art show, and then she introduces him to her parents and Daphne. Meanwhile, Daphne opens up to Emmett regarding her feelings about him, forcing him to make a difficult decision.

Daphne causes a huge mishap at the restaurant, and she grows closer with her boss in the aftermath. Elsewhere, Bay manipulates a situation with her two dads to get what she wants; and Kathryn is envious of the attention an interviewer showers on Regina.

Emmett meets a girl who's a fellow motorcycle enthusiast. Meanwhile, John is enraged when his car wash gets tagged; and Kathryn slyly finds a way to get Toby to stop moping around the house.

John and Kathryn invite Alex to a family dinner, but Bay leaves during the meal to answer Zarra's plea for help. Meanwhile, a coworker asks Daphne to lie to Jeff; Toby grows closer with Nikki; and Regina reaches out to Patrick.

The trial involving the hospital's error gets under way. Meanwhile, Bay tries to return the cash she secretly took from John; Daphne and Jeff's relationship encounters obstacles; and Toby starts a new band.

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.

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.

In the third-season opener, the girls begin their senior year at Carlton, where Toby takes on a coaching position. Meanwhile, Kathryn befriends a tap dancer; Daphne starts her probation work at a free clinic; and Bay's new art teacher inspires her.

Bay strives to impress her art teacher while she struggles with her commitment to field hockey. Elsewhere, Campbell assists Daphne when she makes an error at the clinic; Kathryn invites Renzo home for dinner; and Emmett investigates a vandalism problem.

Bay assists her art teacher at a gallery and hopes to get a letter of recommendation in return. Elsewhere, Daphne struggles to befriend Sharee; and Regina's latest business opportunity puts her in an awkward position.

Daphne searches for a patient she accidentally let leave. Meanwhile, Bay discovers that Emmett is dating again; Jorge wants Daphne to accompany him to a family gathering; and Regina and Angelo have a discussion about business.

John bonds with Nikki's mom while they help Toby move into his new apartment. Elsewhere, Kathryn goes to New York City to pitch an idea for a second book; Bay suspects that Tank has a crush on her; and Daphne worries about Sharee's home life.

Daphne plans a birthday bash for Campbell. Meanwhile, Kathryn hosts a murder-mystery party, where she and John uncover surprises about one another; and Bay wants to score an invite to Tank's fraternity luau.

Daphne wants to help Sharee search for her mom, but problems arise. Elsewhere, Bay and Toby try to get their folks to stop beings at odds with one another; Regina's new project leads to a disagreement with her mother; and Travis' actions puzzle Melody.

Daphne asks to take on more work at the clinic as she contemplates studying premed in college. Elsewhere, Bay tries to measure up to her art teacher's expectations while dealing with her injury; and Travis invites his girlfriend to a dance at school.

Daphne assists Angelo with a fund-raiser at the clinic. Meanwhile, Bay can't ignore MaryBeth's feelings for Tank; Sharee is tutored by Toby; and John and Katherine entertain John's old baseball buddy.

Toby gets an unexpected visit from Nikki. Meanwhile, Bay and Daphne get ready for a big field-hockey game, and the rivalry between their team and the opposition intensifies; and Regina's connections to her old neighborhood prove beneficial.