Summary of the content of "A Doll's House": Christmas is coming, and Helmer and Nora are immersed in joy. Because at the beginning of the new year, Helmer will work as a bank manager, and the days of unstable income when he was a lawyer are coming to an end. At this time, Nora's old friend Mrs. Lin Dan came to visit. During the conversation with Mrs. Lin Dan, Nora excitedly told Mrs. Lin Dan: Not long after she and Helmer got married, Helmer fell seriously ill. In order for her husband to go to Italy for recuperation, she secretly asked the bank clerk Krogstad She borrowed a sum of money, and because her father was also critically ill, she forged her father's signature to sign the IOU. Helmer's illness was finally cured in Italy. Back home, in order to pay off her debts, Nora tried her best to save the family money, and even secretly did some copying work at night. But she didn't feel hard. On the contrary, she felt proud because she had done something helpful to her husband.

At this time Krogstad suddenly visited. What Nora worried about finally happened. It turns out that Krogstad is an employee of the bank where Helmer will be the manager. The bank is undergoing personnel adjustments. Krogstad is likely to be fired, so he blackmails Nora with an IOU to try to keep him in the bank. position, otherwise he would tell Helmer about Nora’s criminal behavior. Nora was very angry, but had no choice but to plead with her husband not to fire him. But the husband ignored it at all and instead issued a general order to fire Krogstad. The furious Krogstad immediately wrote Helmer a letter revealing the truth. In desperation, Nora asked Mrs. Lindane for help. Mrs. Lindane went to Krogstad for this matter. As a result, the old lovers rekindled their relationship. Krogstad, who was full of happiness, decided to retrieve the letter revealing the secret. Mrs. Lin Dan advised him not to worry.

Hermer went downstairs to get the mail as usual, but Nora cleverly entangled him with a masquerade party. Returning at midnight, it was too late for Nora to explain everything, but Helmer still took back the letter. After Helmer read the letter, he became furious and insulted Nora harshly. Just at this moment, the doorbell rang, and someone sent a letter. It was Krogstad's letter and the returned IOU. Seeing that his reputation had been saved, Helmer immediately changed his attitude and became gentle towards Nora again. Witnessing this scene, Nora was filled with emotion. She saw clearly her pitiful situation of being manipulated like a doll, and finally realized that she should be an independent person. After a fierce ideological struggle, she decided to leave That "Doll's House."