Ye Fanxing (played by Qi Wei) and her boyfriend Xiao Han (played by Wu Qilong) have been in love for many years and have a very good relationship. However, for the sake of their careers, they chose to hide this relationship underground. One day, Ye Fanxing met a girl named Min Siyue (played by Zuo Hang), and the two of them soon became good friends with similar interests and personalities. At the same time, Fu Xia (played by Ren Yankai), who thought Ye Fanxing was single, was in love with Ye Fanxing, but this secret love was destined to be unrequited. By chance, Fu Xia was shocked to find that Ye Fanxing's underground lover turned out to be her uncle, and Ye Fanxing also realized that Min Siyue was her long-lost sister. Not only that, the person Min Siyue liked was Xiao Han. In order to fulfill the happiness of others, Ye Fanxing decided to sacrifice herself, but her efforts did not get rewards, but instead made everyone fall into the abyss of misfortune.