In 1912,met French youthin Paris , and the two quickly became friends. They talked at night, shared and translated each other's poems, as well as their taste for women. The two were attracted by the smile of a female statue at the same time. At this time, Catherineappeared and stirred Jules et Jim's heart with the same smile. Jule pursued her and said to Jim, "This is not good, okay?" At Catherine's suggestion, the three went to the country for a holiday together. In order to keep his promise to Juul, Jim buried it in his heart even though he admired Catherine infinitely. Soon after, Catherine accepted Juul's proposal
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World War I broke out. Jules et Jim will fight for their respective countries. Everyone is afraid to meet on the battlefield and kill each other. Finally the war ended, and the two met again. Jim became a reporter. Jule invited him to live in the German countryside. He and Catherine are married and have a lovely daughter. But Jim soon discovered that the relationship between their husband and wife was not happy. Jule tells him that Catherine is leaving him: She has other boyfriends before and after marriage, who is committed to pursuing love and freedom. But as long as she does not leave, Juul said that he is willing to sacrifice everything. One night, Catherine pulled Jim to talk in the woods all night, and Jim finally understood her thoughts.
Catherine suggested to Juul that Jim should stay. Jule agreed. During the day, the three were inseparable. At night, Catherine slept in Jim's room. People in the village cast strange glances at them, but for them, it was their heavenly day. Catherine even wanted to conceive a child for Jim. But the good times were not very common. When the imaginary child didn't show up in any way, Catherine quickly became impatient and reappeared. Jim returned to Paris and plunged back into the arms of his girlfriend Jiao Bei, who had been waiting for him. Catherine acted uneasy and irritable. When Jim finally returned to the country, she took a gun and tried to keep Jim. Jim fled.
Time passed unconsciously. Jules et Jim met again in Paris and it was a good time. Catherine seemed to have become tamed, but she called Jim into the car when she learned how to drive during an outing: "Mr. Jim, I have something to tell you!" She said in the tone of the first meeting with Jim. Jim got in the car, Catherine said to Jule in the distance: "Juul, look at us!" Then he drove the car straight into the lake
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