Case Closed - Season 1 Episode 374

For an astronomical observation, Conan and the group went to this pension deep inside the mountain. Other than the pension owner, there were also other three people in the pension, the victim's fiancee and the two magazine staff. As they went to the nearby hill to see the stars, they saw a decayed bones and on top of it they found the dying message and then that night the other man from the magazine staff was killed and left another dying message.