Lionel Asbo, a terrifying yet weirdly loyal thug (self-named after England's notorious "Anti-Social Behaviour Order"), has always looked out for his ward and nephew, the orphaned Desmond Pepperdine. He provides him with fatherly career advice (always carry a knife, for example) and is determined they should share the joys of pit bulls (fed with lots of Tabasco sauce), Internet porn, and all manner of more serious criminality. Des, on the other hand, desires nothing more than books to read and a girl to love (and to protect a family secret that could be the death of him).
But just as he begins to lead a gentler, healthier life, his uncle - once again in a London prison - wins £140 million in the lottery, and upon his release, hires a public relations firm and begins dating a cannily ambitious topless model and 'poet'. Strangely, however, Lionel's true nature remains uncompromised, while his problems, and therefore also Desmond's, seem only to multiply.