This film describes Princess Dara of Switzerland holding a masquerade ball, where all kinds of people come to witness the elegant demeanour of the pink leopard giant diamond, while diamond thieves and rebels covet the princess leopard giant diamond. Detective Duso of France chased to Switzerland to catch the diamond thief. Sir Charlie had a gentlemanly demeanor, and both the princess and Madame Dusso were deceived by him and secretly had an affair with him. At the ball, Duso caught Sir Charlie stealing on the spot, but the diamond was missing. Madame Dusso discussed a brilliant plan with the princess to get Charlie off the hook, which was framed by Detective Duso and made Duso a household name overnight.
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