Before the First World War, an Austrian, Jules, and a Frenchman, Jim, become friends. They share each other′s confidences, read and translate each other′s poems and visit each other. Later, they meet Catherine and both fall in love with her. Catherine marries Jules and Jim turns to his childhood girlfriend Gilberte. When war comes, the men fight on opposite sides. After the war, they renew their friendship. When Jules tells Jim that Catherine has already left him once, Jim becomes Catherine′s lover. Jules accepts this, so as not to lose Catherine entirely. But Catherine finds out about Gilberte and renews her relationship with an old flame, Albert. Jim tells Catherine that he has decided to marry Gilberte. Catherine seems to take the news calmly, but then drives her car off abridge into a river. This is the story of three people in love, a love which does not affect their friendship, and about how their relationship evolves.