13-year-old Maggie navigates growing up, her first love, and moving to a new town, all while learning she has synesthesia – a condition that makes her see sounds, hear colours and more.

A misfit group of unwitting high school students stumble upon a cursed object, an ancient Aztec Death Whistle. They discover that blowing the whistle and the terrifying sound it emits will summon their future deaths to hunt them down.