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 S.C.S. who send up Jones' partner S.D.I. Mike Karetzi who is soon followed by Charlie White, an ex-con working with the S.C.S. They start investigating but more killings follow and the team from Cardiff are floundering as all their leads come to nothing. Things don't look good.