The long-suffering Superintendent Mullet has enlisted the help of a new D.C.I, Skinner, to rid the Denton Police of Inspector Frost once-and-for-all. The pair see him as a hindrance to the Police Service, which is struggling to adapt to the modern era of Policing. Inspector Frost is his usual uncouth self; derogatory towards women and with a slightly perverse sense of humour, but through this we can see that in a way, they are right: Frost has no place in the modern Police Service and he knows it all-too-well.
Meanwhile, Inspector Frost has to contend with missing children, severed body parts, rape cases and a man claiming to have killed his wife (even though she reports in as alive and living outside Denton). Every time Frost takes on a case, another seems to pop-up, and he begins to feel the strain.
Things take an alarming turn for the worse as his nemesis discovers that Frost has been forging pay-slips for some time (a crime for which D.I Frost could very easily be fired), Frost is cornered in an abandoned butcher's shop by a knife-wielding man and the whole situation is brought to an explosive end in an armed stand-off at a remote farmhouse.