The drama, which was broadcasted on tvN in South Korea on March 21, 2018, was directed by Kim Won-seok, the director of "Signal", and Park Hye-young, the writer of "Another Oh Hae-young". The drama is about a 40-year-old man and a 20-year-old woman who have the same heavy burden of life, and tells the story of how they observe and heal each other.