BBC adaptation of David Walliams' children's book. 12-year-old Joe Spud (Elliot Sprakes) is the son of a billionaire who invented a famous brand of toilet paper, transforming their lives in the process. He has everything he could ever want apart from some friends and he's constantly made fun of by his classmates. After the secret of his new wealth gets out, suddenly everyone wants to be Joe's friend but his dad Len (John Thomson) encounters some troubles with his innovative product and his gold-digger girlfriend Sapphire Diamond (Catherine Tate). Will the father and son manage to get their lives and relationship back on track?