When the gangland owner of a pit bull that killed a three-year-old girl is found gutted on an Edinburgh hill Gus Dury is asked to investigate, and soon finds himself up to his neck in the warring underworld of the city's sink estates. Amidst illegal dog fights, a missing 50 grand and a police force and judiciary desperate to cover their links to a brutal killing, Gus must work fast to root out the truth, whilst the case sinks its teeth ever deeper into him.