Hayley Brooks is your normal, ordinary 15 year old girl. She loves spending time with her friends, she thinks school is incredibly boring and she loves skateboarding. The only thing is, that her brothers Luke, Jai and Beau are part of the youtube group the Janoskians. She has loved their friend Daniel for years, but this all changes when a new boy comes into her life. This isn't the only change she's about to face though. What happens when her friends start to drift away from her? What happens when her crush Sam asks her out? And what happens when Daniel suddenly returns the feelings she had for him for all those years?

Rylee Devine is the little sister of One directions drummer Josh Devine. After an accident resulting in a loss of her parents, she is taken in by her brother and the band. As the spend the summer together, one of the boys finds himself falling for her, but will he break the 'Sister Rule' even if it means risking a friendship?