Hearts of the World is an American movie that was released in the year 1918. The movie was directed by D. W. Griffith and starred Lillian Gish, Dorothy Gish
Two families live next to one another in a French village on the eve of World War I. The Boy in one of the families falls for the only daughter in the other family. As they make preparations for marriage, World War I breaks out, and, although the Boy is American, he feels he should fight for the country in which he lives.
When the French retreat, the village is shelled. The Boy’s father and the Girl’s mother and grandfather are killed. The Girl, deranged, wanders aimlessly through the battlefield and comes upon the Boy badly wounded and unconscious. She finds her way back to the village where she is nursed back to health by The Little Disturber who had previously been a rival for the Boy’s affections. The Boy is carried off by the Red Cross. Von Strohm, a German officer, lusts after the Girl and attempts to rape her, but she narrowly escapes when he is called away by his commanding officer.
Upon his recovery, the Boy, disguised as a German officer, infiltrates the enemy-occupied village, finds the Girl. The two of them are forced to kill a German sergeant who discovers them. Von Strohm finds the dead sergeant and locates the Boy and Girl who are locked in an upper room at the inn. It is a race against time with the Germans trying to break the door down as the French return to retake the village.