Lin Wanzhao, an undertaker in a city funeral parlor, died in a car accident of her sister Lin Chuyang, and became the "stand-in" for the male protagonist Shen Yanqing (cardiac surgeon) - Shen Yanqing regarded her as the shadow of his late lover (Lin Chuyang) and had a long-term entanglement with her. Lin Wanzhao endured his paranoia and indifference and used her professional instinct to appease his guilt, but she gradually fell into trouble in the process. When Shen Yanqing finally saw his true love for Lin Wanzhao, Lin Wanzhao came to the end of his life due to long-term emotional consumption and hidden terminal illness (congenital heart disease). Finally, his heartbeat stopped on Shen Yanqing's operating table, leaving a last wish of "live a good life for me". Shen Yanqing continued to live with her heart and spent the rest of his life making up for the regrets.