During Christmas a local power station worker is burgled Shortly afterward he falls to his death in a mysterious accident Then a young police detective Tim Fox is murdered Frost wonders if Fox&s death is really related to the large investigation he was working on to uncover a car theft gang Frost continues to try to identify detective Tim Fox&s killer In addition he tries to solve a series of pet shootings for which he is eventually forced to seek help from a computer system run by a new junior WPC His pursuit leads to a confrontation above a power station