Welcome to Gardnerville.A place where no one gets sick. And no one ever dies.Except…There’s a price to pay for paradise. Every fourth year, the strange power that fuels the town exacts its payment by infecting teens with deadly urges. In a normal year in Gardnerville, teens might stop talking to their best friends. In a fourth year, they’d kill them.Four years ago, Skylar’s sister, Piper, was locked away after leading sixteen of her classmates to a watery grave. Since then, Skylar has lived in a numb haze, struggling to forget her past and dull the pain of losing her sister. But the secrets and memories Piper left behind keep taunting Skylar—whispering that the only way to get her sister back is to stop Gardnerville’s murderous cycle once and for all.