Eli Snedeker, an avaricious and murderous mine owner in Africa, is insanely jealous of his wife Delia, a gold digger. Angered when Eli's mining engineer, John Gamble, spurns her advances, Delia spitefully accuses John of making a pass at her, and Eli fires him. John further earns Eli's emnity when he prevents him from cheating Roger Smythe out of his claim and goes into partnership with Smythe. Snedeker becomes crazed when he learns that Smythe and John have discovered a huge diamond, and while John is away making arrangements to sell the diamond so that Smythe can join his daughter, Katherine Sheffield, in Cairo, Snedeker kills Smythe while looking for the diamond and accuses John of the crime. Fleeing for his life, John takes the diamond and stows away on board a ship bound for Alexandria. Five years later, under the assumed name of Bradley, John has become very wealthy and goes to London, looking for Katherine to make restitution. There, he falls in love with Katherine and intends to tell her the truth until he learns the depth of her hatred toward John Gamble, her supposed father's murderer. One night, while walking along the Thames during a rain storm, John finds a murdered man, and to end Katherine's torment, he plants the identification papers of John Gamble on the body. Later, John is called in to identify the body, thus arousing the suspicion of a police officer who had seen John at the scene of the crime. Soon after, John and Katherine become engaged, and John takes the diamond to a jeweler to be cut. Snedeker, who is now in London, recognizes the stone and claims that John Gamble stole it from him. Because he cannot prove ownership of the diamond, John is arrested for the murder of "Gamble," and fearful of losing Katherine's love, he refuses to defend himself. In court, Snedeker accuses John of being Gamble, Smythe's murderer, but a remorseful Delia testifies that Snedeker murdered Smythe. An enraged Snedeker shoots Delia, thus substantiating her accusation and freeing John, now absolved of all guilt, to marry Katherine.