Bank clerk Craig Williams is murdered at the dog-track,where,for a change,he would have won – forty five grand. Evidence suggests that the race was fixed and the favourite dog nobbled. Had Craig lived he would have claimed his winnings from bookie Niall McShane and his violent son Ged,who threatens the trainer. But then Ged McShane is killed in the same way as Craig. An ex-wife who stood to gain from Craig's life insurance and a married colleague with whom he had a fling while her husband was abroad are now in the frame alongside the bookie and the trainer.