Voir Sadisflix. The owner of vast diamond mines, John Quelch is constantly fearful of theft and convinced that any woman will "sell her soul" for diamonds, he deals harshly with any employee caught stealing and has Lady Margot Cork watched while she is visiting Lorraine Temple. John and Margot fall in love, but she cancels their engagement when she learns of the "brutal" punishment of Jim Wingate for swallowing a diamond.