Jiang Zhixia, secretary to Gu Yichen, spent five years in a secret relationship, holding on to his promise that he would marry her when she turned thirty. On the eve of her birthday, Gu Yichen breaks his promise for Su Xiao, his first love, who has returned from abroad pregnant. He ends their relationship by offering her company shares. Heartbroken and humiliated, Jiang Zhixia finally gives up on him. On the day of his wedding, she joins Li Group and cuts all ties with Gu Yichen. Only after losing her does Gu Yichen realize what he has thrown away, but his remorse comes too late. The villains eventually face their punishment, while Jiang Zhixia finds true love.