When five year-old Liam denounces religion at his RC Primary School and is subject to a home-visit by his teacher and the local priest, sister Debbie has to think fast. But shaving his head and pretending that he is dying of cancer is NOT one of Debbie's better ideas. In fact, by the time the rest of the Gallagher clan realise what's going on and try to set the record straight, the news has leaked out into the wider community and Debbie's lie lands the family in true Gallagher-style catastrophe. Could things get any worse for Debbie?