Synopsis: Gerald Meldrick is a dashing international jewel thief with designs on a diamond held by the Duchess of Beltravers. He meets his match in the form of Anya Von Duren, a beautiful con artist. As they work against each other, Gerald acts as a Scotland Yard detective, and Anya adopts the identity of a haughty aristocrat. With an inspector and a greedy mercenary captain in hot pursuit, the two team up to pull off a big score.