At a student art show at Buckner Hall, Bay finally meets Angelo (Gilles Marini), after he reveals that he found out about the switch through the newspaper. Daphne finds out that Bay is dating Emmett and that prompts her to tell him how she really feels. In the midst of their argument at the car wash, the two share a kiss before Emmett declares his loyalty to Bay, leaving Daphne feeling more alone than ever. Regina decides to open up her own salon, but soon hits a roadblock when she finds out that because of her past credit scores and other issues, she can't get a loan without a co-signer. Things take a turn for the worse when Bay brings Angelo home to meet the Kennishes, resulting in a heated dispute between him and John. Angelo meets Daphne for the first time since he left when she was three and while she's angry, she also demands answers. Angelo also tries to reconnect with Regina, who is still not over the fact that he left their family and didn't trust her when she told him that she didn't have an affair that resulted in Daphne. After his argument with Daphne, Emmett reveals his frustrations regarding deaf-hearing relationships to Bay. They later make up after Toby speaks to Emmett and Emmett uses his voice for the first time in years and says his first words to Bay. In the end, Toby and Wilke finally persuade Emmett to play the drums for Guitar Face once again for an upcoming music festival. And before leaving, Emmett kisses Bay silently angering Daphne. In the car, Wilke admits to Toby, that he likes Daphne before they leave. When Bay asked Daphne if everything worked out, Daphne tells her that since Bay wasn't okay with her dating Liam, she will never be okay with her dating Emmett, stating that she won't give up on him like she has given up on many other things in her life putting Bay in an awkward state. Angelo shows up that night to tell Regina that he is not going back to Chicago and that he wants to start a new life with her, Bay and Daphne as Kathryn looks on through a nearby window.

After revealing her secret, Regina tries to make amends with Daphne and Bay. Daphne decides to move in with her "real family". Meanwhile, Bay tells Emmett that for her birthday, she wants to see her art on a billboard and enlists his help. However, before they get the chance to put her art up, the pair are caught by the police and injured while climbing a barbed wire fence to get away. Bay also meets Emmett's mother Melody, who doesn't approve of their relationship. Melody's dislike of Bay is heightened when she discovers that Emmett has been injured while spending time with Bay, as well as that he wants to take speech therapy in order to better communicate with her. The girls celebrate their sixteenth birthdays with the Kennishes, the Vasquezes, and the Bledsoes. Regina shows up and is accepted into the party by Bay. Emmett gives Bay a scarf, which he later reveals to be a blindfold. He blindfolds Bay and takes her back to the billboard where he has put up her artwork. The two decide that it would be better if Bay told Daphne about them. However, when Bay approaches Daphne to tell her about the relationship, Daphne reveals that she has realized she has feelings for Emmett, leaving Bay in silent horror.

Daphne discovers that Regina’s guitar case is full of pictures of Bay. Regina admits to Daphne that she knew about the switch since Daphne was three years old. Daphne turns to Wilke to escape this new turn of events. Meanwhile, Bay and Emmett’s relationship becomes more serious. However, the two encounter some problems due to their communication barrier and the fact that Bay feels like Emmett puts Daphne before her. Daphne tells Emmett that Regina knew about the switch. The Kennish’s lawyer prepares John and Kathryn for their trial by dredging up old family secrets. Elsewhere, Regina tries to contact her private investigator to find out who he told about the switch. Regina tries to get rid of the guitar case but can’t part with it. Later, during the legal meeting John and Kathryn are shown evidence that Regina knew about the switch for years. Regina reveals to the Kennish family and Daphne that she found out about the switch when Angelo had a DNA test done before deciding to leave her and Daphne. Everyone is in shock. No one more so than Daphne, who doesn’t know who she can trust anymore. Bay is in just as much pain, believing that her biological mom didn't want her. Bay turns to Emmett for comfort, and Regina leaves the Kennish house.

Bay believes she's uncovered her birth father's identity. She asks Daphne and Emmett to accompany her when she goes to meet him. Meanwhile, John and Kathryn suspect Regina is to blame for the hospital's recent action regarding their lawsuit. Bay finds out that the man she thought was her father isn't actually him. Regina talks to Toby about his addiction to poker, and he ends up taking responsibility for his actions. Daphne asks Emmett if something is going on with him and Bay, but he replies that nothing is. However, Emmett later tells a surprised Bay that he likes her and then proceeds to kiss her. Daphne unlocks and opens the guitar case that supposedly belonged to Bay's father after figuring out that the code is BAY. The contents reveal that Regina knew about the switch and has been keeping track of Bay for most of her life.

Daphne joins an advanced cooking class at Buckner Hall, but soon comes across some difficulties because she is Deaf. This leads to Daphne becoming more self-conscious and insecure. Bay and Emmett bond while working together to find Bay's biological father, and they discover that his name is Angelo Sorrento. Elsewhere, Toby and Wilke draw up and enact a plan to steal a chemistry test in order to pay off their poker-playing debts.

John catches Bay sneaking in after a night out with Ty and invites him to chili night, when Ty reveals that he has enlisted in the army and is leaving in three days. Daphne and Emmett play poker with Toby against Toby's friends, but Toby explodes on Daphne when she makes a wrong move. Regina and Bruce bond, and Bay tells Ty goodbye.

Bay learns that Daphne is seeing her ex-boyfriend Liam, while Daphne, Kathryn, and Regina learn that Bay is seeing Ty. The truth about the switch and the gossip makes Kathryn uncomfortable after hearing a rumor that Daphne is John and Regina's love child. Bay feels like Daphne is trying to steal her life and gets upset after a Kennish family photo is taken without her in it. Emmett fills in as the drummer for Toby's band, 'Guitar Face.' He gets jealous when he finds out that Daphne is dating Liam, which results in an argument before he leaves. Daphne ends up breaking things off with Liam because of Bay and other outside pressure, and Regina hits it off with Denise's ex-husband Bruce.