Sonoko (Ayane Ryokawa) and her husband Ichiro (Takuya Sakurai) come deep into the mountains and are attacked by the UMA Tsuchinoko, and Ichiro is kidnapped. Sonoko is rescued by Kurikoma (Fumio Moriya), an aardvark hunter, and descends the mountain alone, but her colleagues do not believe her. With the encouragement of Satomi (Yumi Yasuno), Sonoko goes to meet Ichiro and search for the Tsuchinoko's den again.