The male protagonist, Gao Yang, is 36 years old, divorced and has a child, and runs a mahjong company in the financial center of S City; the female protagonist, Yoona, is 28 years old, a senior white-collar worker at a well-known Internet company in S City, and has a fiancé whom she has been in love with for many years. Gao Yang and Yoona, two completely unrelated people, developed a love affair in the city because of a website.