Due to a mysterious affliction, Iria, a gifted individual, has been confined to a secluded estate on Wet Crow's Feather Island by the Akagami family, who have imposed an indefinite house arrest. With limited company, Iria invites a select few stars to keep her entertained, including tech genius Tomo Kunagisa and her anonymous companion, talented soothsayer Maki Himena, esteemed artist Kanami Ibuki, scholar Akane Sonoyama, and renowned chef Yayoi Sashirono. However, what should have been a pleasant visit quickly turns into a nightmare when one of the guests is brutally murdered. With no clear motive or suspect, tension mounts among the island's residents. Tomo's assistant takes it upon himself to uncover the identity of the killer and put an end to the violence before it spirals out of control.