Bertrand is an accountant employed by a large London firm. He is in love with Cary, who works for the same organization, and they plan to marry. Bertrand is called to the office of the Managing Director, Dreuther, to explain a mistake in the accounts. He impresses Dreuther with his skilful explanation of the error. Hearing that Bertrand is soon to marry and has planned a honeymoon in Bournemouth, Dreuther tells him to go to Monte Carlo instead and spend the honeymoon there at the expense of the firm. But events in this fabulous semi-tropical paradise do not work out quite as Bertrand had envisaged ...