The story of people who really wanted to be happy | Like walking slow, like singing joyfully, it's living. Legendary rock singer Tae-soo (played by Kim Sang-joong), who dominated the music scene in his childhood, visits his son Gun-sung's house in 15 years. Tae-soo, whose philosophy of life is to live so roughly that even his son's name is Gun-sung, is far from the traditional image of a responsible and sacrificial father. Meanwhile, son Gun-sung is a man of good living who prepares music and study step by step as planned so as not to be like his father, and I don't like Tae-soo, a father from one to ten. The relationship between the two, which is a mixture of affection and affection that has been building up for 15 years in a quarrel, is hardly narrowed.