Yoshiyama Kazuko is a third-year junior high school student. One day while cleaning the lab, she smells lavender and faints. From then on, she has the power to travel through time.

Obayashi's take on the famous Kosuke Kindaichi series, made popular partly thanks to the numerous movie-adaptions by Kon Ichikawa, the most known being The Inugami Family. Kosuke Kindaichi is the most famous detective in Japan. Kindaichi gets a new case to figure out who has beheaded a valuable statue and made off with its head.