Haruna and Shinji are a happy couple. To celebrate his graduation from university and his new job, Shinji went on a short trekking trip and proposed to Haruna. The elated couple got lost on the way down the mountain and were stranded. They somehow managed to reach a mountain lodge and asked for help, and ended up staying there, but the hungry men who kept coming to the lodge couldn't just leave the beautiful Haruna alone... The two were trapped in the lodge and spent their days in hell.