In Touhou Makuka Sai Fantastic Danmaku Festival Part III, a conspiracy involving a strange moon over Gensokyo is uncovered. During the annual Mid-Autumn Festival, the Lunar Exhibition is unusually lively. As the full moon rises, a vast curtain descends upon the earth, halting the movement of the night sky. This phenomenon attracts numerous yokai creatures previously known only by rumor interested in the ongoing banquet. The storyline continues the events of the previous incident involving the second spring snow, setting the stage for a new incident.