A large estate agency and their associated company of lawyers are being targeted by unknown assassins. One by one the main family who own and run the companies are being murdered. The Serious Crime Squad are asked to investigate. D.I.'s Karetzi and Jones who together with two civilians, Amber Gilberts and Charlie White, an ex-con, make up the S. C. S. They are at a complete loss of who and why. From their office in a Cardiff terraced house the young maverick Karetzi works closely with his partner, the much older and sober Jones. Charlie (Chalky) helps where unlawful access is required and the...

Special Detective Inspector Evan Jones from the Serious Crime Squad based in Cardiff has taken his wife Edna and daughter Jasmine on holiday to the beautiful Italianite village of Portmeirion in North Wales where the 1960's cult T.V. series 'The Prisoner' was filmed. During dinner a man walks into the restaurant and shoots dead four men eating on an adjoining table before calmly walking out. By the time D.I. Jones reacts the man has killed a fifth and has completely disappeared. The local force just a few miles away in Portmadog cannot cope with such a big case and request help from the...