There is a small town called Jinling in the northeast. The Dong family is the largest landowner in this small town. They have shops, properties, and businesses. The Zuo family, the Qin family, and the Dong family are family friends, and they are also wealthy families. Dong Huailan, the only daughter of the Dong family, and Qin Hannian, the second son of the Qin family, were childhood sweethearts. Wan Xitang, the eldest son of Wan, has always been secretly in love with Dong Huailan and felt jealous. Dong Huailan and Zuo Rouming went abroad to study when they were thirteen years old. While studying abroad, they joined the organization and returned to their hometown under the code names of Tomorrow and Haoyue. Dong Huailan and Qin Hannian got married. Not long after, the Northeast fell. Huailan and Rouming went to Shanghai in the name of the organization. There, Huailan worked with Rouming as a doctor in their own hospital. However, when Dong Huailan was performing his mission, he accidentally discovered that the codename Sirius was Qin Hannian...
Purpose: Love and friendship are all important