There are no more monsters anymore, or so the children in the city of Lucille are taught. With doting parents and a best friend named Redemption, Jam has grown up with this lesson all her life. But when she meets Pet, a creature made of horns and colours and claws, who emerges from one of her mother's paintings and a drop of Jam's blood, she must reconsider what she's been told. Pet has come to hunt a monster, and the shadow of something grim lurks in Redemption's house. Jam must fight not only to protect her best friend, but also to uncover the truth.