At a wedding, the groom (Guan Zhe) and the bride (Mao Junjie) set up an ex-boyfriend table and an ex-girlfriend table, gathering the groom's ex-girlfriends and the bride's ex-boyfriends, ambushing two dangerous encounters. At the wedding, the ex-boyfriend table and the ex-girlfriend table were either brothers, or tit-for-tat, or true feelings, or toasting and hesitating. Men and men, women and women, men and women were witty, laughing and cursing, reflecting the current love of modern people. Meng Yun (Han Geng) is an ordinary young man living in Beijing and has achieved some success in his work. At this "unique" ex-girlfriend's wedding, he accidentally met Xia Lu (Yao Xingtong), a girl who appeared in the "ex-girlfriend table" set by the groom. In this way, Meng Yun and the ex-girlfriend's husband's ex-girlfriend began an unexpected love. Meng Yun and two college classmates Yu Fei (Zheng Kai) and Luo Xi (Wang Likun) run a small company together. The three of them started from the difficult entrepreneurial years after graduating from college and have come to the present. Regarding youth, they cherish their exclusive memories of each other. However, Luo Xi's feelings for Meng Yun have spanned from youth to the present. For fourteen years, she has silently protected Meng Yun, and Meng Yun also loves Luo Xi without knowing it. Accompanied and witnessed by good buddy Yu Fei and Xia Lu's best friend Xiao Wen (Ban Jiajia), Meng Yun and Xia Lu's love has been tested by their predecessors. The neurotic and fragile ex-girlfriend Lingling (Medina), the alcohol-addicted ex-girlfriend Meng Meng (Xiong Naijin), the ex-girlfriend Shang Dan (Liu Yan), who spends money like water, and Xia Lu's ex-boyfriend Park Enhao (Li Xiangye), who is so poor that he only has money left, have more or less affected their love. When the smart girl Xia Lu turned these situations around, she didn't expect Luo Xi to become an insurmountable gap. Luo Xi is engaged to Zhao Ming (Zhang Hanyu), a wealthy, mature and considerate man. At the engagement party, Luo Xi, who is drunk, reveals her true feelings, and Meng Yun also discovers his deep love for Luo Xi. Xia Lu cannot face their feelings and runs away from the engagement party. Later, Xia Lu and Meng Yun fall down the stairs during an argument, causing Xia Lu to have a miscarriage. How will Meng Yun, Xia Lu and Luo Xi clean up the mess of their relationship, and where will everyone's feelings end?