When a veteran of the police force kills a mob informant during what appears to be a struggle, Conan suspects that he's lying about it being an act of self-defense.

Conan, Ran, and Kogoro are out to eat when they meet students from Beika University. A murder occurs on the street, but somehow the blood ended up on the wall of a building, the railing of a rooftop, and broken glass of an upper apartment window! Conan is after the cunning killer imbedded in an outwardly innocent mountain-climbing fraternity, desperately trying to hide deadly secret!