Michiru visits the land where her dead lover, Akira, had previously visited; a fortress on a solitary island. The queen that she meets there resembles someone she knows very well.

Adaptation of the novel. Novel summary: It’s 2113. Michiru has to make an emergency landing with her small airplane in an unfamiliar land. With her companion Rodi, she eventually arrives at an isolated fortress city inside a forest. It’s like a tiny paradise ruled by the queen Debou’suho. However, what starts with a murder on the festival night turns into a hidden secret in what should be a perfect city, a secret that ties in with Michiru’s own past. A story about the rivalry between the will of god and the dignity of humans, a new frontier for the author’s mystery novels.