When mysterious creatures known as Damedame begin causing trouble, young detective Anna and her friends are called upon to investigate a strange new phenomenon: valuable objects marked with an X suddenly stop working. Their investigation takes an unexpected turn when a fairy named Rain asks them to protect a girl named Karin from the Damedame. Rain leads the detectives to Karin’s beautiful, dreamlike garden, where they meet Karin and Alan, a fairy who watches over her. As Anna and her friends grow closer to Karin and begin uncovering the garden’s secrets, the Damedame suddenly appear there as well. What are the mysterious Damedame, and what secret lies hidden within Karin’s garden?