The Detective Boys are at a small ski resort and meet up with four university students who are building a snowman for an art project. Later that evening, Sakuko Kokura, one of the university students, becomes lost in the blizzard and the two groups begin their search for her. Conan finds Kokura dead at the bottom of a cliff in a lake.
Accident?
Location:Lake
Victim:Sakuko Kokura
Cause of death:Drowning
Suspects:Tanji Kiyama, Asaka Onoe, and Kazuya Itabashi
The police declare that Kokura's death was a snowboarding accident. However, Conan notices that the body is missing a hat, goggles, and gloves and believes that she was murdered and that one of the university students is the culprit.
Part 2
Genta trips and falls into the snow and comments how it was hard and salty. Conan realizes how the murder was done and gathers the suspects along with Inspector Misao Yamamura.
Conan tranquilizes Yamamura and impersonates him using his voice changing bow tie to reveal that the murderer is the university student Kazuya Itabashi. Conan reveals that during the snow storm, Kazuya used salt to harden the snowman he was working on. He then called Sakuko to his room where he drowned her in his sink which contained the water from the lake. Afterwords, he attached Sakuko's snow shoes on and placed her in the body of the hardened snowman and rolled her into the lake. He then used the Detective Boy's snowman to rebuild a new body for the snowman. As evidence, Conan reveals that the Detective Boy's snowman had their detective badges, which are now found in Kazuya's snowman. He also declares that the forensic team should find traces of lake water or Sakuko's DNA in Kazuya's sink. Kazuya confesses to the crime revealing that Sakuko purposely disabled Asaka Onoe, one of the other university students, out of envy; this sparked Kazuya's murder in the name of vengeance.
Season 16 (2011)