Fireflies That Light Up the Truth

The Detective Boys attend a firefly festival to commemorate a shinto shrine in a village. The truck soon arrives with the fireflies and they are released into the fields. Later one of the truck drivers, Tokurou Nakamine, is found murdered and three of the villagers are the prime suspects. Conan notices a flashlight Genta found inside the truck and realizes who the murderer is. Using Agasa, Conan reveals the second truck driver, Shuchirou Tarumi, to be the murderer.