Embarking on a luxurious vacation to a secluded island brimming with brilliant minds takes a dark turn when murder infiltrates the paradise. Akagami Iria, once a prestigious princess exiled from her affluent family's fold, resides on Wet Crow's Feather Island in solitude with her attendants. Despite her seclusion, she extends invitations to Japan's intellectual elite, including the young college student Ii-chan and his tech-savvy comrade Kunagisa Tomo. Amidst a captivating ensemble of women with diverse talents, Ii-chan grapples with the intimidating intellectual prowess surrounding him. However, a chilling murder disrupts the tranquility of the island, unveiling Ii-chan's latent talent for discerning truth from deception and identifying a hidden killer among them.