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The Iron Heart Synopsis

Possessed of an iron heart and a desire for power, Stephen Martin rules his iron works with a hand of steel. Even his son Tom, who marries against his father's wishes, is forced to leave home. At the death of his brother, who owned an even larger manufacturing plant, Martin inherits his brother's property, and Mrs. Martin, unable to improve socially with her husband, is forced out of the house to make way for adventuress Anne Parnell. When the workers in the plant demand more pay, Martin refuses, and a strike is called. Tom tries to pacify the strikers, but to no avail. During the strike, the plant is burned to the ground, and Martin finds himself financially ruined. His heart then softens, and he returns to his wife and begs forgiveness of his son.

Via Wireless Synopsis

Marsh, a draughtsman in the gun factory of John Durant, is swindled by Edward Pinkney, Durant's general manager, out of the huge royalty to be paid should a gun of Marsh's invention prove a success. Pinkney loves Maisie, but is far outrivaled by Lieut. Somers, U.S.N. Somers also has invented a gun which he gives to be cast by the Durant Iron Works, and which, if successful, will do Pinkney out of his expected graft on the Marsh invention. Pinkney takes good care that the Somers gun is "killed" in the making. He then misrepresents Somers to Maisie and her father, and though Maisie loves the Lieutenant, she feels she must give him up. Accompanied by her mother and Pinkney, she goes in the Durant yacht for a cruise in Turkish waters, formally engaging herself to Pinkney. The Durant yacht hits a mine, and in the rush to leave her, Maisie is trapped in the wireless room. With the water surging up about her shoulders, and every means of escape barred she sends out the S.O.S. signal taught her by Lieut. Somers. The lieutenant, aboard a U.S. cruiser, protecting American interests in Turkey, gets the signal, and arrives at the side of the doomed ship just in time to make a sensational rescue. Here follow a mass of complications as the plot gradually resolves itself to its end.