Kohei and Akira are a couple running away together without a destination. They meet a geology researcher namend Shiraki on the way and the three visit a log cabin of a famous geologist Kanbe. With fortune teller Eiko, ex-girlfriend of Kanbe, joining the party, five people of diverse ages, sexes, statutes, and professions happen to spend a night together in the log cabin deep in the mountains. As the strangers get to know each other and grow closer, each one of their hidden pasts is brought to light. Meanwhile, following a thunderstorm and an earthquake, something even worse is approaching them...