Can a group of ten year old mates (and one scruffy dog) really outwit the most fiendish, cunning adults in the universe and save a frightened friend from the worst fate imaginable? When mysterious smelly footprints lead the gang to the school kitchen, they find themselves in a race against time to save their new best friend. The seasons are changing, and the fate of an entire species lies in their hands ... Dennis and Gnasher are back...