The story begins when Conan and his acquaintances visit a snowy mountain resort. What was supposed to be a relaxing trip suddenly turns into chaos when a murder case occurs, bringing a series of unsolved mysteries.
Under harsh weather conditions, heavy snowfall, and an isolated location, the culprit seems to be hiding among those present. Clues are cleverly concealed beneath the white snow, forcing Conan to use his full deductive abilities to uncover the truth.
Beyond simply solving the case, the movie also explores character psychology, motives behind the crime, and secrets buried in the past. As they get closer to the truth, the danger increases, making the hunt for the culprit more intense than ever.