Conan, Ran, Sonoko, and Sera attend the birthday party of their classmate Sekizawa Yumi and her older sister and model Sekizawa Remi. During the party, while the restaurant lights have been turned off for a slideshow, hair and makeup artist Hanasaki Mizutoshi, who had been hitting on the Sekizawa sisters, can be heard groaning in pain. When the lights come on, Hanasaki's dead body is on the floor. Furthermore, the words "divine punishment" have been written on his forehead... Meanwhile, Sera recalls the day her mother Mary was turned into a child.