Out on a camping trip, Conan, Agasa and the Detective Boys come across a dead treasure hunter. While Agasa alerts the police, the others meet a group of rival treasure hunters and follow them into a strange, trap-filled mansion.
Kogoro is hired by a woman to find her missing cell phone, which her lover is about to call. Not long after she finds it, she is murdered and the killer appears to be one of her family members, all of whom have alibis.
Takagi, Conan and the Junior Detective League become witnesses to a botched jewelry store robbery when the robber seemingly jumps to his death. However, the behavior of a company manager in a nearby building makes Conan suspicious of him.
When a magician's apprentice is murdered during a blackout at her missing mentor's house, Conan and Heiji come to realize that the killer has created an illusion to cover their tracks.
Dr. Agasa's latest cipher proves a tough nut to crack even for Conan. Meanwhile, Conan helps Ran and Sonoko figure out a murder victim's dying message over the phone.
