In a world where humans mutate into wild beasts known as Noahs, seventeen-year-old Cassidy only cares about protecting her sick sister. When she is bitten by a Noah, she has exactly thirty days left before she herself becomes a monster. Only with the help of the rebel Daniel does she have a chance to obtain medicine in time. But who would help a ticking time bomb, where the slightest touch could lead to their own infection?.