Kogoro is asked to investigate a murder threat against Rika Okano, a respected artist who is up for an award. The threat is simple: If Rika receives the award, she will be murdered.

Kogoro, Ran and Conan join a client who has hired an assassin known as "the Fox" to kill him to a hike in the mountain to stop the assassin, who turns out to be a member of the party when a guide is killed.