Jim Gay (Wilfred Pickles) is a northern miner with an obsession for greyhound racing. Having seen Raving Beauty romp to first place at short odds because everybody has backed it, Jim decides to increase its odds for the big race by pretending that Raving Beauty is ill and unlikely to finish the race. But keeping his secret from his wife Maggie (Megs Jenkins) and daughter Sally (Petula Clark) is a tougher job than Jim Gay ever imagines. Whilst Jim and Peter (John Blythe) find ever more comical ways to keep their secret under wraps, their world is turned upside-down when an unknown but highly-fancied greyhound enters the race and is kennelled at the local vicar's house.