During a primeval forest guard mission, a female ranger met two survivors, a father and son, who lived a wild life in the post-apocalyptic style. The beliefs of father and son seem to be in their own way, and their relationship with nature is subtle and mysterious. The people of the forest were full of doubts about the origins of the father and son, but when their hut in the forest was attacked by a mysterious creature at night, she suddenly realized that there was an even more terrible danger in this wilderness that grew wantonly.