Janelle Pruitt is into activism and causes, her former best friend Alyssa is just into herself and her "group" of self-absorbed teenagers; but then Alyssa collapses, and it turns out that diabetes has ravaged her body as badly as the recent hurricane ravaged their town and now she is in urgent need of a kidney transplant--Janelle signs up for the donor program, but when it turns out that she is an excellent match for Alyssa she is faced with a terrifying and life-changing decision: just how far does a former friendship require you to go.