Deep in the cellars of the O'Brien Press is a safe that contained stories too horrible to be read. But somebody has broken into that safe and the stories have been released. This is one of those Forbidden Files. 'They called it 'The Fart Factory', it smelled so bad. The Kanker & Byle Chemical Company was a towering heap of buildings and pipes and walkways, just piled on top of each other. Then somebody had stuck some chimneys on the top, like candles on the world's ugliest birthday cake'. When the Root Street Gang lose their football in the Kanker & Byle Chemical Factory, Gaz sends his little brother Joey in to get it back. And then they lose Joey. Faced with returning home without his brother and facing his Mam's wrath, Gaz has no choice but to lead his friends Hayley and Damo into the factory to find Joey and their football. But this is no ordinary factory, and in no time at all, Gaz, Hayley and Damo encounter the living dead, giant insects, and a man with the most disgusting job in the world. But there is an even worse fate awaiting them at the end of their search.