Danny O'Neill hasn't had a single good night's sleep in the year since he discovered the book of storms. Exhausted and a social outcast, he wishes only to escape the shadowy figure of Sammael who controls his dreams and nightmares.

Cath Carrera dreams of escaping her brutish father. So when she meets Barshin, a talking hare who offers her protection, she doesn't think twice about going with him. In return for his protection, Barshin wants Cath to deliver a message to Danny: he must rescue his cousin Tom from Sammael before it is too late.

Together, the three must find a way to stop Sammael before he destroys Tom. But even with the help of a friendly stag, the journey is a near-impossible mission. Danny and Cath will have to muster every scrap of bravery and ingenuity to have a hope of succeeding.