As the undefeated world farting champion, Marty, aka the Baked Bean Bandit, has always dreamed of winning a gold medal at the Smelympic Games – and at last he has his chance. Australia's popular hero of fartism, is unwell, and the PM herself has asked Marty to take his place. Marty will be representing Australia in the most demanding event of all – the Great Stinkathlon. But to his horror he is confronted by an old rival. El Stinko Diablo, defeated by Marty at the world championships, is thirsting for revenge, and he will stop at nothing.