Yukiko Kudo takes the Detective Boy's to the see the a sneak preview for the Kamen Yaiba film. However, the preview was postponed and the Detective Boy's go with one of the film's employees while they wait.

Kogoro and Conan witness two men fighting over a backpack. Later, when one of them apparently dies in an accident, Kogoro and Conan investigate whether it is a murder under the guise of an accident.