Kim Young-hoo, a student on academic leave, works as a security guard at a construction site. One day, while visiting a friend who is a medical resident in obstetrics, he meets a pickpocket. The woman teases and deceives Young-hoo because of his naive kindness. She is an escort and dies after giving birth to a child whose father is unknown. Young-hoo sheds tears as he scatters the woman's ashes into the river. On a clear morning, Young-hoo carries the child on his back and walks into the lecture hall.