When the curtain of green night rises, we will watch a fraction of one family’s drama.
A night guard finds a dead cat hanging by the neck. Because of this, he is tense but doesn’t say much about it to his wife. Wonhyung, the son of the night guard, works as a clinical social worker. He seems to only make ends meet. Then Wonhyung's grandfather's death drags this whole family into an unexpected journey of reminding them of old memories. And at the grandfather's house, they happen to meet one woman.