An innocent man has died in police custody, and the truth about his death is hidden under layers of contradictory lies. The truth may never come out, unless one citizen, of questionable sanity, infiltrates the Metropolitan police headquarters in disguise, convincing the police to make their lies more and more absurd until the truth becomes impossible to hide.

This comedy, originally written in 1970, is just as relevant today, exploring corruption, lies, and police brutality.