The bitter secretary of a businessman plans to murder him and replace him with a hired look-alike accomplice in order to drain the company's bank accounts.

Marion Forbes is the secretary, the lover and the creator of the financial fortunes of Harry Chapman, but Chapman falls in love with Francis and decides to marry her. The revenge of Marion is terrible. With the help of the third voice she kills Harry who is then impersonated by the third voice. All of this to steal $600,000.—Piergiorgio Romani <[email protected]>