Yeonu has lived in her hometown for years while all her friends have moved away and old properties sold to construction companies. One day, she helps her ill mom who is a cleaning lady at a major corporation and runs into an old elementary school friend. She asks her for a favor that leads to an exploration of self and surroundings. What will Yeonu learn from the events of this summer? A heartwarming and insightful drama about the pressures of growing up.