A bookie and his assistants attempt to recoup their losses by rigging a horse race
- Ronald Shiner, Brian Rix, Peggy Mount, Lee Patterson, Sid James, Joan Sims, Heather Sears, Michael Shepley and others
- John Roy Chapman
- Maurice Elvey
- Jack Clayton
Turf accountant 'Honest' Alf has a nice little earner going, but when a punter makes a substantial win on an extremely unlikely horse race result, he and his right-hand men, Fred and 'Flash' Harry, have to go on the run - they're out of money and out of luck!
Needing to replenish their wallets, they plot to fix an upcoming race by replacing the dead cert winner with a lookalike horse who'll be knobbled to lose. Employing a down-on-his luck Canadian to keep up appearances as their secretary, the group check in to a small hotel run by an aged Colonel, his wife and daughter, and begin to make plans.
Unfortunately for Alf, their new horse double doesn't appear to be in the best of health, and Sweet Lavender's constitution is not helped by the lack of food that results from hiding out in a small establishment. If she's not healthy enough to win that's one thing, but she at least needs to be alive to make the swap!
Things go from bad to worse for the motley crew when the real horse's rider, Frenchman Monsieur Polignac, arrives, having booked a room for the week at the very same hotel. Compounded with Fred's monumental stupidity, the house's poor standard of repair, and the colonel's gun-happy, burglary-wary nature, and Alf and Flash have a real task on their hands just to get to race day!