At their engagement banquet, Su Mu's girlfriend, Yu Wenjing, feeds her male childhood friend, Jiang Qingyuan, mouth-to-mouth in front of everyone. Jiang Qingyuan even reveals that the two of them have kissed before. After enduring this for eight years, Su Mu finally loses all hope. Looking back on those eight years, he realizes that even his engagement suit was made to Jiang Qingyuan's measurements, his parents were neglected, and his beloved kitten was forcibly drained of blood until it died. So he calls off the engagement, quits his job, returns to his hometown, and blocks every means of contact. When Yu Wenjing discovers the truth, she is consumed with regret and desperately begs him to get back together. But Su Mu gives her only one reply: "You're no different from a stranger to me." He refuses to turn back.