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Stop at Nothing Synopsis

Burley Walters and 'Shadow' Brice, rival crook leaders are after the Denman diamonds. 'Shadow' wins the confidence of Daphne Denman, but Walters beats him to it and gets the diamonds as they are being transported on a San Francisco ferry boat. After a furious fight 'Shadow' wrests the gems from Walters and then reveals himself to the girl as a secret service man.

The Key to Power Synopsis

Bruce Wendell, the son of West Virginia coal mine owner James Wendell, graduates from West Point and prepares to lead a fighting unit to the front during World War I. As his father lies dying, however, he convinces Bruce to remain at home and guard the mine. Bruce's fiancée Ann Blair assumes that he is a coward and breaks off their engagement, but her brother Bobbie remains Bruce's loyal friend. Meyer, a German agent, persuades railroad president Parrish to refuse to transport Wendell's coal, but when Bruce adamantly refuses to close the mine, the spy's men decide to blow it up. While Ann is being abducted by Meyer, Bobbie is buried in an explosion at the mine. Bruce rescues Bobbie and then sends a plea to Lieutenant Parrish to rescue Ann. Meyer and his gang are captured and Ann renews her vow of love to Bruce.