An all-female detective outfit, the "Eyes Enquiry Agency", is formed as a front for the Home Office's new security operation the Covert Activities Thames Section (or CATS for short). Initially led by ex-Oxford Union President Pru Standfast, she was followed by experienced ex-cop Maggie Forbes (who later led the section), computer genius Frederica "Fred" Smith and later Tessa Robinson. Their contact with the Ministry was Nigel Beaumont. The team dealt with a variety of crime from theft to blackmail, to espionage & terrorism.