Kim Hyun-woo (Kim Rae-won), who went to Harvard to study, mistook Lee Soo-in (Kim Tae-hee), a woman he met by chance, for a prostitute on the first night, leaving a very bad impression on both of them. At the beginning, he encountered setbacks in his studies, and the professor he wanted to apply for the most did not give him the opportunity to attend classes. He met Soo-in in the library again, who planned to spend the night in the reading room, and the two quarreled again. After Kim Hyun-woo and Soo-in explained the misunderstanding, he began to be fascinated by her. This woman worked part-time while studying, and was also a volunteer caring for AIDS patients. She lived a full and fulfilling life. In terms of studies, Hyun-woo not only received the recognition of the professor, but also attracted the jealousy of his classmate Zhengmin. When Zhengmin learned that his father's death was related to Hyun-woo's lawyer father, and that the admired Soo-in was in pairs with Hyun-woo, he used shady tricks to obstruct Hyun-woo's various efforts. After graduation, Hyun-woo was influenced by Soo-in to help incompetent people to fight lawsuits and track down pollution cases. This case involves the interests of too many people, and both Hyun-woo and Soo-in are threatened. At this time, Soo-in falls ill and is diagnosed with leukemia...