The journey begins on a ship at sea in 1766, with a boy named Billy Marvel. After surviving a shipwreck, he finds work in a London theatre. There, his family flourishes for generations as brilliant actors until 1900, when young Leontes Marvel is banished from the stage. Nearly a century later, Joseph Jervis runs away from school and seeks refuge with a reclusive uncle in London. Albert Nightingale's strange, beautiful house, with its mysterious portraits...

While searching for more clues to the murder of his circus performer parents, talented magician Danny Woo follows the Mysterium circus to Barcelona, where he discovers a traitor and a dangerous woman in green.

To achieve her dream of attending Princeton University, sixteen-year-old Lily Carter accepts the challenge of seeking the Ivy Key to a magical realm, where she finds herself caught in a power struggle between two worlds, with her family at its center.