In this companion volume to 'The Boggart', the mischievous shape-shifting spirit living in the Scottish Castle Keep sets out to rescue Nessie, one of his few remaining cousins.

Nessie has become a shadow of his former self and can no longer protect himself from the overzealous scientists exploring his loch.

In a race against time and technology, Emily and Jessup join up with the Boggart to help Nessie escape to his ancestral home.