A detective who has been turned into a robot vacuum cleaner races through the city of Otaru to protect his niece. The novel combines absurd premise, urgency, family bonds, and the momentum of an adventure story within a mystery framework.

A detective in the form of a vacuum cleaner runs through Otaru to protect his niece.

Set in 18th-century Versailles, the novel follows Princess Marie-Amélie as she is drawn into a murder case and uncovers court intrigue and mystery. It emphasizes the tension of an investigation unfolding beneath the splendor of the palace.

Set in 18th-century Versailles, the novel follows Princess Marie-Amélie as she is drawn into a murder case and uncovers court intrigue and mystery.