The Suzaku Unit of the Taiwan underworld Zhengdaohui specializes in assassination. GlassHeart (G.H.) is the top killer trained by the organization. She is delicate and precise, and her caution is even ridiculed as cowardly, but she can accurately hit the heart of any prey with one shot, with a range of more than 600 meters. After assassinating 50 people, the daughter of the 50th prey, Wuxin, said a few childish words that finally broke G.H., and she could no longer live as a killing machine. So she jumped from a tall building and let the sharp iron railing pierce her heart. On the other hand, Ryo Saeba was finally going to marry Makimura Kaori, but on the eve of the wedding, Kaori died in a car accident to save a child. According to the organ donation will filled out by Kaori before her death, Kaori's heart was donated. Unexpectedly, it was robbed during the transportation process, and Kaori's heart was transplanted into G.H's body by mistake. G.H.'s surgery was very successful but she still didn't wake up. Her consciousness was resisting the idea of "waking up". At this time, Xiang's voice sounded in her heart. Organ transplantation sometimes carries memories and emotions from her previous life. With Xiang's encouragement and comfort, G.H. finally woke up, killed the organization's guard and escaped. With her memory, she came to Shinjuku, Japan from Taiwan - where Ryo Saeba and Xiang lived. Since Xiang's death, Ryo has no intention of working for City Hunter (C.H). The message board has long been removed from the station. G.H. came to Shinjuku and was accidentally reminded of the memories by the City Hunter code XYZ. She came to the station. However, the message board was gone. She walked into the Cat's Eye Cafe opened by the sea monster (Falken) in frustration. The blind sea monster mistakenly thought that G.H. was Xiang because of the way she walked and knocked on the door, so he told Ryo: "Xiang is back" - G.H., who fainted, was admitted to the Garden Clinic. The doctor also told A Liao that G.H. had many strange things. In fact, G.H. was Xiangying, the daughter of Li Jianqiang, the leader of the Zhengdao Society. Li Jianqiang had never known that his daughter had been trained by the organization to be a killer. While Xiangying was still recuperating, the captain of the Qinglong unit of the Zhengdao Society secretly came to Shinjuku to kill Xiangying. After knowing that Xiangying's heart was A Xiang's heart, A Liao decided to protect her, and on the other hand, for his good friend, Li Jianqiang and his brother Li Qiande. The two sides fought against each other, and the Xuanwu unit directly under the leader of the Zhengdao Society finally annihilated Qinglong. The captain of Qinglong was also punished by Li Jianqiang. The guilt accumulated by Xiangying before her collapse and suicide began during the training period. At that time, Xiangying, who was only code 27, had a partner, No. 36, but she killed him in the final training for survival. In this battle, No. 36, who was supposed to die, betrayed Qinglong in order to protect Xiangying. It would be more appropriate to say that Xinhong had decided to die for Xiangying... Originally, betraying the organization would be punished, but Li Jianqiang decided to let him go after testing his determination to Xiangying and let him leave the organization (although he finally sent his confidant Mr. Chen to monitor him). Xinhong stayed in the Cat's Eye Cafe, and Mr. Chen opened the Xuanwu Chinese Restaurant opposite. A Liao and A Xiang used to joke that "the person with A Xiang's donated heart is their child", and with Li Jianqiang's private request, Xiangying became A Liao's adopted daughter, and from time to time she would show A Xiang's maternal side~ After returning to normal life, Xiangying was completely out of touch with reality, and Xinhong was deeply in love with her. After a test, Xiangying became the new city hunter, and Li Jianqiang commissioned Chen Lao to re-erect the message board at the Shinjuku East Station. Urban legend - XYZ strikes again...