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 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.

Bay and Daphne receive cars from John and Kathryn on their birthday, but Daphne is uncomfortable accepting such a lavish present. Meanwhile, Regina stops hiding out at Melody's place; and Bay and Emmett's secret romance continues to flourish.

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 follows Emmett to a music festival, hoping to get some private time with him. Elsewhere, John requests that Regina be present when Bay sees Angelo again; and Kathryn secretly talks to a nurse who could assist in the lawsuit against the hospital.

Angelo attends a dinner at the Kennishs' home. Meanwhile, Bay helps Emmett move into his dad's place, where they meet his father's girlfriend; and Daphne and Wilke go out on a date.

Kathryn's mother visits the family and forms a bond with Daphne, yet Daphne still feels a strong connection with where she was raised. Meanwhile, Bay and Regina look into Angelo's disappearance; and Toby realizes he can only please Simone if he changes.

Emmett photographs Bay and Daphne's blended family for a school assignment. Meanwhile, Regina gets acquainted with an art-gallery owner; Daphne questions Simone's trustworthiness; and Bay and Emmett divulge their true feelings to each other.

Bay and Daphne arrange an ASL zombie movie shoot for Emmett's birthday. Meanwhile, Emmett wrestles with whether to tell Bay about his betrayal; and Regina has doubts about assisting with Kathryn's book.

Bay returns from a trip abroad with a new boyfriend, but she must face issues from her past concerning Emmett and Angelo. Meanwhile, Daphne seeks employment help from Kathryn; and Regina impulsively makes a big decision.

Regina and Angelo face repercussions from their marriage. Meanwhile, Bay meets a fellow street artist; Daphne and Emmett enter their zombie movie in a film festival; and John's baseball record is in jeopardy of being broken.

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.

In the first-season finale, the trial ends with a surprising outcome. Meanwhile, Bay leaves with Zarra and doesn't inform anyone; and Daphne and Jeff's romance is revealed.

In the second-season opener, a newly wealthy Angelo buys expensive presents for everyone. Meanwhile, John and Kathryn contemplate entering the political arena; Bay faces cheating accusations; and Daphne lands in hot water because of Jeff.

Melody hosts a tolerance retreat after tension builds between the hearing and deaf students at Carlton. Elsewhere, Kathryn's remarks during a radio interview may jeopardize John's campaign; and Regina gets some alarming health news.

Bay hosts an anti-Valentine's Day party, where Noah and Travis get into a fight. Meanwhile, Angelo and Lana call a temporary truce; and Regina disagrees with the Kennishes on how to deal with a situation concerning Daphne's food truck.

The Carlton students learn the outcome of their protest. Meanwhile, John's campaign concludes abruptly; Emmett contemplates telling Bay about Daphne and Noah's kiss; Lana's labor begins; and an inebriated Regina turns up at Angelo's door.

Toby and Nikki's relationship is strained by work and wedding planning, so Bay tries to help Toby find a release by booking a gig for his band. Meanwhile, Regina and Bay's messiness irks Angelo; and Jace introduces Daphne to a new adventure.

A look at what would have happened if Regina had revealed the switch when she first uncovered it finds both girls being raised by the Kennishes: Daphne has a cochlear implant and is spoiled and manipulative, while Bay's a top scholar who overcompensates.

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.

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.

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.

Kathryn's book is leaked before it's published. Meanwhile, Bay is skeptical about Emmett's new girlfriend; Daphne has an unexpected encounter at the clinic with someone from her past; and Regina feels a sense of guilt about her behavior.