Jiang Ying discovers that in the marriage she once took such pride in, she was actually the other woman who destroyed someone else's relationship. Heartbroken and crushed by the disgust and contempt of the male lead, Lu Xiuyuan, Jiang Ying ultimately chooses to end her own life. Time rewinds to five days before her death, just as Xia Ruyan—the younger sister of Lu Xiuyuan's first love—returns from abroad. Intent on winning Lu Xiuyuan for herself, Xia Ruyan deliberately uses her sister's name to trip Jiang Ying up and make her back down. Lu Xiuyuan, who never cared about his marriage to Jiang Ying in the first place, sides with Xia Ruyan at every turn, wounding Jiang Ying again and again. In the end, Xia Ruyan reveals that Jiang Ying was the other woman between Lu Xiuyuan and her sister, and that Jiang Ying indirectly caused her sister's death. Shocked and enraged, Jiang Ying chooses to take her own life. Xiuyuan assumes Jiang Ying's disappearance is just a tantrum and doesn't care in the least—he even revels in being free of her. Meanwhile, Xia Ruyan makes several attempts to take Jiang Ying's place, all in vain. But Lu Xiuyuan gradually comes to recognize the quiet, enduring love Jiang Ying had for him. When he finally begins searching for her, he learns of her death. Lu Xiuyuan is consumed with regret and self-reflection, but the departed are gone forever—his amends and his love have nowhere to go, and he can only live on scraps of memory. Jiang Ying was rescued from her suicide attempt by her senior schoolmate Ye Yunhan and has been living in seclusion in another city. When Xia Ruyan discovers Jiang Ying is still alive, she fears Lu Xiuyuan will find her and reconcile, so she stages a car accident to kill Jiang Ying. Jiang Ying survives by sheer luck, but Lu Xiuyuan also discovers her whereabouts. The joy of finding her again makes Lu Xiuyuan vow to make it up to her—but when Jiang Ying wakes, she has lost her memory, and the only person she doesn't remember is Lu Xiuyuan. Thus begins Xiuyuan's long journey to win back his wife. Through countless twists and tender moments, the two finally clear up their misunderstandings and are reunited.