Dennis and his faithful hound Gnasher are out to make every day as much fun as possible, but their adventures often lead them into trouble. After a prank misfires and puts the school cook out of action, Dennis and co go undercover to give the pupils a day of school dinners they will never forget - only the headmaster, half a tonne of hyperactive lobsters and a school inspector who looks suspiciously like Walter stand in their way.
