Pip lives by his wits in the city of Clarel. But when he picks the wrong pocket, Pip finds himself in possession of a strange dried heart in a silver casket--and those who lost it will stop at nothing to get it back. With assassins on his trail and the ominous heart beginning to whisper to him, Pip and his childlike older sister El are drawn deeper into the forbidden world of magic. Now they must seek the help of the secret witches of Clarel and Princess...