When her brother is struck down by Posies--a contagion that has killed everyone by their late teens for generations--fifteen-year-old Ice Cream Star pursues the rumour of a cure and sets out on a quest to save him, her tribe and what's left of their future. Along the way she faces broken hearts and family tragedy, mortal danger and all-out war--and much growing up for the girl who may have led herself and everyone she loves to their doom.