There's evil afoot in the form of the rich but bored architect, Mr Big the pig. He has plans to steal Peng's superhero gadget collection. When half of Spanners' latest inventions go missing and he and Peng get blamed for several dastardly crimes, the superheroes realise they need to kick into action . . . but are they all about to be out gadget-ed and can they stop arguing for long enough to find out?!