Rose Howard is obsessed with homonyms. Shes thrilled that her own name is a homonym and she purposely gave her dog, Rain, a name with two homonyms - Reign, Rein - which, according to Roses rules of homonyms, is very special. Not everyone understands Rose's obsessions, her rules, and the other things that make her different. When a storm hits their rural town, rivers overflow, the roads are flooded and Rain goes missing. Now Rose has to find her dog even if it means leaving her routines and safe places.