Xia Yan (played by Sun Yi), Han Shuang (played by Ma Li), Zhao Xiaolei (played by Du Yuchen) and Xiang Nan (played by Zhang Wen) are good friends who studied and lived together in college, and they have a very close relationship with each other. After leaving the campus, the four girls stepped into society and did not lose contact. They stayed in the same city and worked hard for their own future. Xia Yan is determined to make an APP that can completely change people's lives. Although Han Shuang was born with a golden spoon, she is unwilling to be kept in a comfort zone by her parents and sticks to her dream of becoming a designer. Zhao Xiaolei is looking forward to a happy life after marrying her boyfriend, but she is betrayed by her boyfriend when the wedding is about to be held. As a doctor, Xiang Nan shoulders the heavy responsibility of curing diseases and saving lives. While sticking to her post, can she treat her lonely heart well?