Secombe plays the part of Harry Flakers, a man who has a big win on the football pools. He and his friend Spike Donnelly (Milligan) decide to go to the same shabby seaside boarding house that they have always patronised for their summer holiday, but this year all the other guests (including two young women out to marry money, a dodgy investment advisor and a master forger and assistant) are intent on taking the fortune off them in one way or another.