The drama tells the story of a man and woman in their 40s who reunited with their first love. They are neither middle-aged nor young, but they fall in love and struggle fiercely, ushering in the second "In the Mood for Love" in their lives. Yoo Ji-tae plays the entrepreneur Han Jae-hyun, who is a "beautiful middle-aged man" with a slender figure and outstanding appearance, but he is a cold-blooded man and now becomes a tacky person who is good at financial management. Lee Bo-young plays Yoon Ji-soo, a strong single mother who raises her children alone. She used to be the daughter of a popular prosecutor, but she lost her family in an accident and lived a hard life every day. Han Jae-hyun and Yoon Ji-soo fell in love and ushered in their first "In the Mood for Love". They reunited in a completely different situation in middle age when they were tired of life, and continued their love story. Park Jinyoung plays Han Jae-hyun in 1993. He was born in Seoul and entered the law department of Yonsei University first in his school. With his slender stature and handsome features, he was rated as the "ace" of the law school and attracted attention as soon as he entered the university. However, he himself did not care about love between men and women. Without anyone's persuasion or coercion, he just participated in the student movement naturally like flowing water. The play tells the story of a man and a woman in their 40s who reunited with their first love. They are neither middle-aged nor young, but they fall in love fiercely and struggle, ushering in the second "Mood for Love" in their lives.