Loser Takes All is a 1955 novella by British author Graham Greene.
Mr. Bertram and Cary are about to get married. An unambitious assistant accountant, Bertram's plans for marriage are not particularly exciting. One day, he comes to the attention of Dreuther, the powerful director of his company, who changes Bertram's plan for him: they are to wed and honeymoon in Monte Carlo. Dreuther will meet the couple in Monte Carlo and be their witness, on board his private yacht.
Bertram and Cary arrive in Monte Carlo but Dreuther does not show up. The couple are therefore forced to stay there. Bertram is angry with Dreuther. In order to make sure they can pay the hotel bills, Bertram visits the casino. At first he loses, but gradually his system starts working, and he begins to win big money. He wins so much money that he gets the attention of Mr. Bowles, another director of the company gambling in Monte Carlo, who is also a rival of Dreuther. Bowles wants Bertram to lend him money. In exchange, Bertram wants Bowles' shares of the company, so that, in gaining control of the company, he will get his revenge on Dreuther.
Loser Takes All is a 1956 British comedy film directed by Ken Annakin, starring Glynis Johns, Rossano Brazzi, and Robert Morley, and based on a screenplay by Graham Greene.