

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. Conan reveals that Tarumi murdered Nakamine in a desolated location near the village before turning the truck around and meeting with the other villagers. As evidence, Conan reveals the flashlight Genta found was actually a dictation machine with Nakamine's voice recorded on it. Tarumi takes Haibara hostage and attempts to flee but is eventually apprehended. Conan reveals that Tarumi's was tried of being blackmailed by for embezzling money from the firefly project and Nakamine's company and thus motivated his murder.
While on a date with Rachel, Kudo is attacked by two shady thugs who slip him an experimental drug. The effects of the poison will turn Jimmy’s life upside down!
Conan sets out to discover the fate of a wealthy businessman’s kidnapped daughter. His new identity is a secret to everyone but his eccentric inventor friend, Dr. Agasa.

Pop diva Yoko Okino is being stalked and she's come to star-struck Richard Moore's doorstep for help! Luckily for all involved, Conan is on the job, too.