An American business magnate and international playboy residing at the Paris Ritz. Initially suspected of infidelity, he becomes fascinated by a mysterious girl who warns him of a murder plot. He playfully dubs her 'thin girl' and pursues her upon his return to Paris a year later. Though initially committed to casual relationships, he eventually falls deeply in love with Ariane, abandons his planned trip, and reunites with her, ultimately settling in New York City with her.
Young woman who falls in love with the much older Flannagan
Having an affair with Monsieur X's wife
Hires Claude to investigate the mystery woman
Jealous husband planning to shoot Flannagan
American businessman falls in love with detective's daughter
Private detective hired by Flannagan to investigate his lover
Social acquaintance in Parisian circles
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