Azidic Corporation President Kana Iwakuni plans a ski tour with her boyfriend Takuma Akahoshi. By chance, it turns into a large tour with a total of fifteen people. Starting from the eighth day of a two-week itinerary, a severe blizzard hits. Fifteen people are stranded at the mountain lodge "Snowdrop." That night, a severed head is discovered in Kana's cottage. The body is found in the president's cottage, which is in a locked-room state. Time passes meaninglessly, and during this time the number of victims reaches nine. Finally, a reporter who questions the conclusion that the culprit "Judgment" left a suicide note and hanged himself takes up a documentary as a clue, leading four detectives to launch a new investigation into the case. Based on the clues presented, the detectives reach the culprit and, after an intense discussion, manage to bring about an arrest.
| Word | Frequency | Difficulty |
|---|---|---|
| ミス | 1 | 3.74 |
| 電話を入れる | 1 | 6.55 |
| 本名 | 1 | 4.20 |
| 深く | 1 | 3.06 |
| しかし | 1 | 2.08 |
| 三人 | 1 | 2.77 |
| より | 1 | 2.31 |
| 密室 | 1 | 4.75 |
| 当人 | 1 | 3.82 |
| 残念 | 1 | 3.09 |
| 乱文 | 1 | 6.64 |
| とんだ | 1 | 4.13 |
| その事 | 1 | 3.14 |
| なれば | 1 | 2.99 |
| そうする | 1 | 3.75 |
| 姿 | 1 | 2.21 |
| しか | 1 | 2.33 |
| 思い起こす | 1 | 4.33 |
| 捕まえる | 1 | 3.41 |
| 迄に | 1 | 3.09 |
| 信じられない | 1 | 3.47 |
| 自分なり | 1 | 4.49 |
| ならない | 1 | 2.51 |
| 上 | 1 | 2.23 |
| 悔しい | 1 | 3.38 |
| ペン | 1 | 3.95 |
| 一斉に | 1 | 3.36 |
| 入れ | 1 | 2.71 |
| この場を借りて | 1 | 5.31 |
| 就きましては | 1 | 4.70 |
| 違う | 1 | 2.29 |
| なんだ | 1 | 2.26 |
| いらっしゃる | 1 | 3.26 |
| 騒ぎ | 1 | 3.37 |
| 向け | 1 | 2.69 |
| 賢明 | 1 | 4.35 |
| 一つ | 1 | 2.53 |
| 有り得ない | 1 | 4.03 |
| 他に | 1 | 3.02 |
| 致す | 1 | 3.43 |
| 分析 | 1 | 3.75 |
| からこそ | 1 | 3.25 |
| 最後まで | 1 | 3.43 |
| 力 | 1 | 2.15 |
| 探偵社 | 1 | 5.80 |
| 数 | 1 | 2.61 |
| 光景 | 1 | 2.91 |
| せ | 1 | 2.05 |
| 日間 | 1 | 3.78 |
| られる | 1 | 1.68 |
| 頬 | 1 | 2.86 |
| 白日 | 1 | 5.06 |
| スキーヤー | 1 | 7.19 |
| 強い | 1 | 2.36 |
| それ自体 | 1 | 4.10 |
| 申し上げる | 1 | 3.65 |
| 状態 | 1 | 2.57 |
| 権限 | 1 | 3.80 |
| 考え | 1 | 2.19 |
| 前回 | 1 | 3.44 |
| 可能 | 1 | 2.85 |
| 10 | 1 | 3.12 |
| 殊に | 1 | 2.16 |
| 第三 | 1 | 3.46 |
| し | 1 | 1.60 |
| 凄惨 | 1 | 4.30 |
| なり | 1 | 2.48 |
| この様 | 1 | 3.25 |
| たまたま | 1 | 3.63 |
| 長野県 | 1 | 5.98 |
| それ程 | 1 | 3.03 |
| 当事者 | 1 | 4.02 |
| 方々 | 1 | 3.33 |
| 発動 | 1 | 2.87 |
| 組織 | 1 | 3.25 |
| テーブル | 1 | 3.02 |
| 加筆 | 1 | 4.60 |
| 多く | 1 | 2.66 |
| お詫び | 1 | 4.04 |
| 板 | 1 | 1.29 |
| 今になって | 1 | 4.20 |
| 間 | 1 | 2.43 |
| 者 | 1 | 2.04 |
| 預かる | 1 | 3.59 |
| 置く | 1 | 2.56 |
| 続いて | 1 | 3.13 |
| 三 | 1 | 2.74 |
| 他 | 1 | 2.34 |
| 幾 | 1 | 2.12 |
| 訂正 | 1 | 3.90 |
| 序章 | 1 | 5.25 |
| 話 | 1 | 1.96 |
| 報道機関 | 1 | 5.63 |
| 見え | 1 | 2.91 |
| 30日 | 1 | 4.78 |
| かも | 1 | 2.76 |
| 命 | 1 | 2.72 |
| どういう | 1 | 2.81 |
| 後書き | 1 | 4.82 |
| 開け | 1 | 3.07 |
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