Yujeong is suicidal, yet she reluctantly goes to prison for volunteer work. There, she meets a prisoner who is waiting for death penalty. The two quickly fall in love despite their differences, yet they do not have much time.

Young, a careless person, suffers from terminal illness and gets admitted in a hospital for treatment. There, he falls in love with a patient. After recovering, will he get back to his former life

Several Questions That Make Us Happy is composed of six different stories in a omnibus way, describing mondern society's loneliness, misunderstanding between couples, trust with others, courtesy between lovers, and self-centered blame for others, etc. It is based on the sincere question why we are so unhappy and how I can make happiness.