Bear hunters are in search of a legendary bear. Conan decides to follow the murderer to see why he killed a man, but does not try to harm anyone else.

Kogoro has a lawyer client who is receiving death letters from someone with the initials "T.K.". When the lawyer ends up dead and a man with the initials "T.K." was a former client of the lawyer, the prime suspect is found. However, when they arrive at his house, he is also dead.