After informant 'Nosey' Parker has tipped them off about the drug-dealing habits of boxer-turned-gangster John Coogan, CI5 interrogate Coogan's younger brother, Paul,who dies, seemingly after Doyle has hit him. Coogan gets his powerful lawyer to instigate a committee to determine whether or not CI5 should be disbanded but Cowley's own investigations throw light on the true cause of Paul's death as well as exposing Coogan's violent activities and confirming the need for the department's continued existence.
—don @ minifie-1