Police come to investigate, and when they question Bridget Kelly (Yvonne De Carlo), who found the body, she tells them everything she knows about his past.
A Czech refugee, missing and believed dead, Sabourin one day turns up to find his love Zina (Lisa Ferraday) is now married to his brother, Gerry (Tom Conway).
At the port in New York he observes the shady Miss Kelly as she makes off with ship passenger Leonard Wilson's (Victor Jory) wallet.
As he becomes increasingly "successful", Sabourin begins courting a number of women romantically, including Mrs. Ryan's young secretary, Stephanie North (Nancy Gates).
Sabourin attempts to interfere in her marriage to gain control of her stock and form a new uranium company, but Zina resurfaces one night and reveals that she learned he was responsible for his brother's death.
The mother is initially happy to see her son, but refuses his plan to tell the court that Sabourin was born illegitimately in Switzerland and disowns him.
Miss Kelly, who has long concealed her love and concern for Sabourin, implores him to return the stolen money and tells him that his way does not work out in the end.
No sooner does he endorse the stock certificates, O'Hara (who hitherto had qualms concerning their crooked dealings) arrives and confronts him at gunpoint.
As he returns home dejectedly, he sees all of his would-be victims emerging successful as well as a billboard with the verse Mark 8:36 written on it.
Kelly then surmises that it is possible Sabourin found forgiveness and peace in death, taking one last look around his magnificent house as she leaves.
The film was based on an original script by Charles Martin which was inspired by the life and death of Serge Rubenstein.