When Dudley sees a strange creature in the forest behind his house one night, he decides to set out with his friends, the Dudley's Adventure Club, to capture the monster and save the town. Tree-houses, forest trails, traps, and streams all feature in their adventure as they go into the deep dark forest. Will they capture the monster? If they do what will they do with the creature? Is there only one? Dudley is determined to solve the secret of the Forest Monster and he needs the help of his friends to do it!