Marty's Aunt Clara hires Jeff as a bodyguard for a trip to Monte Carlo where she plans to win £100,000 on her self-devised gambling system. With a thousand pounds, she plans to make £25,000 on the first night, £50,000 on the second night and the remainder on the third night. Although she professes to not like gambling, she claims to have studied every failed gambling system "since 1879" and has already won enough at a local casino to pay for her airfare. Having gone through four years of theorizing Clara is ready to put her system into operation, though is unknowingly tailed by suspicious staff from the first Casino, most notably, Brian Blessed. When she arrives at Monte Carlo, French gangsters clash with the English gangsters, both of whom are fighting over Aunt Clara's system. After much conflict they join forces, holding Jeannie at gunpoint so that Jeff and Clara will go with them after Clara's third night of winning at the wheel. Jeff begs Clara to lose, and, when she won't agree, uses Marty to rig the roulette. With the assorted gangsters now believing Clara's system to be beginner's luck, they leave only for Jeff to learn they were being watched the entire time by Casino security. Jeff, Jeannie, Marty and Clara take the plane home only for Clara to speculate what to tackle next horse racing or the stock exchange!