When it comes to drumming, Leah Burke is usually on beat - but real life isn't always so rhythmic. An anomaly in her friend group, she's the only child of a young, single mum, and her life is decidedly less privileged. And even though her mom knows she's bisexual, she hasn't mustered the courage to tell her friends - not even her openly gay BFF, Simon. With some messy dynamics emerging in this once tight-knit group of friends, senior year suddenly gets even more complicated for Leah, as she realises she's falling not for the guy who's taking her to prom, but for the girl who's dating her best friend.