Through the story of a single family, Brassneck traces a history that parallels the Labour Party's advent to power in 1945 through to the property speculation of the 1960s and the disillusionment with the Labour government in the early 1970s. Like most of the early work of the writers, David Hare and Howard Brenton, committed radical (if not revolutionary) socialists throughout the 1970s, it is a satirical attack on capitalist greed and corruption, full of savage, and often disturbing, humour.

Jack Regan, an unethical officer of the Flying Squad, uses unorthodox methods to pursue criminals with the help of his partner, George Carter.