A man and a woman who run into each other on a film set were actually lovers in the past. As they play the roles of a couple in the movie, they think about the relationship they once had.
5 years old Yang spends an afternoon with his mother on a shopping trip. When he throws a tantrum after feeling neglected, she decides to punish him by walking away. A seemingly harmless punishment eventually becomes a pivotal childhood experience for Yang that will forever change him.
