To turn his ghostly sister back into a human, twelve-year-old fraidy-cat Tom must fight the Beast, a century old demon stealing kid's souls.
Tom is afraid of his own shadow. What if it turns into a monster and attacks? Luckily his older sister, Sally, protects him from everything that scares him: classmates, teachers, shadows...
One night during a heavy thunderstorm, a real monster attacks Tom in his very own bed. At the last moment, the dog of their new neighbor saves him from the Beast. But even the Beasthunter and his not so doggish dog can't stop the Beast from turning Sally into a ghost.
Will Tom find the courage to confront the Beast to find out if he can rescue his beloved sister that way? There seem to be no effective weapons. All he can count on are his ability to see through the Beast's disguises and the imagination that has given him scares and frights for all his life.