Necessity is the mother of invention. After their stock portfolios slide into the cellar, the two friends Roderik and Fabian have set up another profitable business: the "Marriage Swindler Company". Roderik is the brilliant strategist who directs the amorous scams with a great deal of foresight. Fabian is the front man whose charm melts the hearts of the proudest women like butter in the Koh Samui sun. Fabian also tries to win the heart of Miriam Berger, the rich heiress of the famous "Siam Residence" resort, with his well-rehearsed charm charades. But then Roderik's ingenious strategy gets out of hand: Fabian actually falls in love with Miriam and stops thinking about business...