In early summer, Lin, a teacher who serves as the assistant advisor for the mountaineering club, went mountain climbing with advisor Zuo Ci to scout for the summer training camp. However, on the way, Zuo Ci sprained his ankle and was unable to get down the mountain. For Lin, who disliked Zuo Ci for his sneaky personality, this was the worst possible situation. After wandering around, they arrived at a mountain lodge, which turned out to be a hellish place illegally occupied by the yakuza. Not only was Lin's body tormented by the yakuza, but Zuo Ci also pinned her down...