The latest book in the picture book series of Chinese traditional festivals, where the beauty of traditional Chinese festivals echo in various modern stories. This book, centering on the Mid-Autumn Festival, tells a moving story of "promise" and "watching". The little girl Yueyue has an "appointment of reunion on the full moon day" with her dad who works outside. The Mid-Autumn Festival is here, and the family is filled with a strong atmosphere, but Dad has not returned, even the Moon being masked by the dark clouds. Yueyue's heart was calling to the Moon: "Please come up soon. That is a promise." Dad came back in the end, not because of the moon reappearing, but he put the promise (and Yueyue) in his heart.