While hiking, Kogoro, Conan, and Ran hear the moaning voice of the tengu, a mythical dog-like creature. After staying the night at a guest house at the bottom of the mountain, they decide to visit the tengu's cave, one of the town's historic sites. Inside the cave, Conan discovers a body wearing a tengu mask hanging from the shrine. The body belongs to Mayor Shoji Mayama. Kogoro determines the death is a suicide based on the absence of anyone else in the cave, but Conan feels there's something off about the body and crime scene.
Times accept seconds (91) or clock format (1:31).
