The Thing We Love (1918)

Just prior to America's declaration of war, Margaret Kenwood of the Kenwood Manufacturing Company determines that the plant should produce munitions to support the Allies. Rodney Sheridan, her sweetheart and a vice president of the company, remains unimpressed with Margaret's patriotism until he begins to suspect that the plant's president is involved with a group of German spies. Posing as a laborer, Rodney discovers that the president has agreed to blow up the factory in exchange for a large payoff from the German government. Rodney's claim of loyalty to the German cause earns him the assignment of planting the bomb, but a detective observes him acting suspiciously and arrests him. Although the evidence is against Rodney, he finally proves that the president and his cohorts are the real conspirators.