After returning from a six-month overseas exchange program, Shen Mohe discovers that her boyfriend of three years, Xie Huaizhi, has crossed the line with her best friend, Jiang Shuyue. Worse still, the advanced-study opportunity she spent a year preparing for has been transferred to Jiang Shuyue without her permission by Xie Huaizhi. With her accumulated disappointment finally reaching its breaking point, she calmly ends the relationship, resigns from her company, and revives an arranged childhood engagement agreed upon by her family years ago. Her betrothed, Lu Qinghe, has secretly loved her for years, always treating her with tenderness and understanding while steadfastly protecting her. Gradually overcoming her heartbreak, Shen Mohe sincerely embraces this new relationship. Only belatedly does Xie Huaizhi realize his regret and attempt to win her back, but it is already too late.