In the midst of a monotonous period of protective isolation, Zac is pleasantly surprised when Mia, his new neighbor on the oncology floor, turns out to be nothing like he'd expected.
Mia delays her first chemotherapy treatment to accommodate an important visitor on Valentine's Day, and later, in the dark of a long day's night, Zac does what he can to bring a smile to her face.
A surprise visit from Zac's best friend Cam serves as the reality check that Zac doesn't need, and on the other side of the wall, Mia inquires about the voice behind her late night lullaby.
As things are looking up, an unexpected guest arriving at just the wrong time leaves Zac feeling hopeless.
Zac lets Mia in on his private hobby, and ultimately brightens up her otherwise lonesome night in the hospital.
Make A Wish officially grants Zac a wish, and an ensuing late night video chat with Mia takes an unexpected twist.
Zac suffers the unfortunate consequences of his recent impulsive decision, and Mia opens up to a new confidante.
Zac follows Mia on a spiritual journey in his fever dreamlike state.
Zac is enjoying his 18th birthday until he receives crushing news, and a stubborn Mia prioritizes prom over her health.
In a spontaneous turn of events, Mia realizes it's time to put someone else's needs before her own and surprises Zac.
Zac's possible release day takes a turn that nobody sees coming.
As Mia begins to wrap her head around her new situation, Zac receives clarity on his Make A Wish.
Zac and Mia are finally a couple, but both are dealing with new hurdles that will put their relationship to the test. Desperate to get back to his life before cancer, Zac finds getting a fresh start may be harder than he thought while Mia learns to live as an amputee.
While Zac catches up with an old friend, Mia meets Evan's new friend.
Mia gets off to a rough start with her physical therapist and Zac comes up with a plan that might help them both with the transition back to a normal life.
Tired of "taking it easy", Zac makes a decision that could risk his health. Mia finds a support group and is surprised to find a familiar face.
As Zac continues to push his health too far he finds he may also be pushing Mia away. Mia meets her new prosthetic leg and learns a secret about Trevor.
Zac's lie makes Mia doubt their relationship. Mia starts to realize she may have more in common with Trevor than she thought.
Zac pushes Mia to go to a concert with him for her birthday despite her fear that she's not ready to be in public.
Zac's decision to go night surfing has disastrous consequences. Mia struggles to decide how best to help Zac find his new normal.
With her health declining, Ashley and Evan surprise everyone with an impromptu wedding ceremony at the hospital. In the aftermath of Zac and Mia's break-up and Zac's accident, this happy occasion has more than a few obstacles.
Mia's plans to move out push Zac to confront his fears head on.
Zac finds out that his surfing accident may have more harmful consequences for his health than he imagined and Mia prepares to move out.
In the season finale, Mia moves out and Zac gets his test results back.
