Master thief known as the Jack of Diamonds who performs glamorous jewel heists. After encountering and wrestling with Olga on a luxury liner, he teams up with her, her father Nicolai, and his mentor Ace to rob a police-guarded vault. He successfully swaps a priceless necklace for a copy but triggers an alarm. To secure Ace's release, he negotiates with Interpol to secretly return all stolen jewels, ending his criminal career penniless but leaving with a genuine diamond gift.