In South Korea, Chuseok holiday is reserved for family, friends, and food. It's no different for Yoo family. This year, the family expects Yoo Jin Woo to come with his longtime girlfriend, Cha Mi Jo, one of the constant presence in Yoo household over the last 4 years. It's all good, if only they are still together. Yoo Jin Woo has successfully dodged every single question about Cha Mi Jo over the past year, pretending like she is still part of his life when reality is the farthest from the truth. Until they meet at Jeju International Airport and Mi Jo finds out the truth that Jin Woo lets his family think they are still together. In this magical Chuseok, the ex-couple find themselves thrown together by an unlikely scenario. Will Jin Woo tell his family the truth? Or will Mi Jo plays along with the holiday ruse?