Kogoro attends his alma mater and takes Conan, Ran, and Sonoko with him. A university student named Sonsaku Tsujiei asks Ran if she could examine how realistic their corpse is and guides her along with Conan and Sonoko through a haunted house production hosted by Tsujiei and his three friends. Inside the set, Anna Tadami dies after convulsing on a table. The police conclude it to be a suicide after finding a cyanide capsule in her mouth and her past obsession with death.