A filmmaker recalls his youth in the town of Onomichi. In the present, he shoots a film in Onomichi alongside his cast, crew and family.

A girl, Kalina, who lives in Belarus spends summer vacation at grandma's house in rural area. They village is very close to the area prohibited to reside because of radioactive contamination. Kalina's family had lived there, but they break up in the attack of mom. Dad moved in far-off Moscow to earn the hospital charges for Mon. One day, hospitalized Mon tells Kalina 'There is a castle of devils in a town called Chernobyl. They are spreading out poisons.' Kalina tells grandma it. She laughs and says 'God will attack them.' However, grandma gets sick, and mom's condition has deteriorated. Kalina wonders why God wouldn't help her. 'If god wouldn't do anything, I do by myself' Kalina decides to go to Chernobyl.

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.

When lightning strikes a theater about to close its doors, three moviegoers are thrust back in time to the world inside the screen.