Thirteen-year-old Will Booth is feeling terribly lonely. Ever since his dad died, he and his mum and their dog Spot are doing everything they can to cope with the feeling of emptiness that his father has left behind. On a cold, miserable Saturday afternoon Will takes Spot out for the usual walk along the riverbank, but is met by a tall, odd-looking man. The man describes himself, and his kind, as Watchers and tells Will that he needs his help to save Will's dad from great danger. How can Will's dad be in danger? Who are these Watchers that Will meets? Are they travellers or something more than that? And what are the mysterious, misshapen humps hidden beneath their coats? Another exciting thriller from Philip Caveney - acclaimed author of the Sebastian Darke thrillers for children and the Alec Devlin mysteries - and sure to be a hit.