Episode 1: Kate and her family arrive at the hospital, her mom and dad brain dead. Kate gets adopted.
Episode 2: Kate Manning, a 9 year old girl with stage 2, spine cancer, is adopted by Doctor Natalie Manning. On her first day as an orthopedic and emergency medicine Jr. doctor, she meets Hayley Kline, a girl with Non-Hochkins Lymphoma.
Episode 3: Hayley and Kate become friends and work together to help a 10 year old boy named Dan with a rib fracture.It turns out that Hayley goes to the same school as Kate. Both of them become best friends.
The Headcannon of this would be: Kate and Hayley might become more than friends.
Season 1 episodes 1-3