Sixteen-year-old twins Matt and Em can bring art to life, and travel in time through paintings. They work for Orion, an organisation that protects their kind. The twins are sent to find a teenage boy who can alter reality with his music and who carries something that could change humanity for ever...

Imagination is a powerful thing. There are three things in this world that seventeen-year-old Rémy would guard with his life: his gold pendant, his blues harmonica and his mother's journal. This is all he has left of his murdered family. And he believes these objects will lead him to their killers. Rémy can't hunt them down alone. He needs Matt and Em Calder, twins who can bring art to life and travel through paintings. For, like them, Rémy has supernatural powers. He is a Conjuror, descendant of an ancient bloodline that can change reality with music.