Touching Evil follows the exploits of the Organized and Serial Crime Unit (OSC). Maverick Detective Inspector Dave Creegan is the newest member of the unit, an elite, rapid-response crime squad. The OSC uses their diverse crime-fighting skills to bring justice to society. Along with his stalwart partner DI Susan Taylor, Creegan squares off against some of England's most dangerous criminals – a serial murderer of children, a killer intent on murdering hospital patients, and a cyber-criminal who lures young Web-surfers with a gothic fantasy game and manipulates them into committing violent crimes.