In-chul, a scholar of botany, is climbing a mountain for some research when he meets Jin-suk who lives in a forest cottage. At the request of Jin-suk's father, Sang-do, In-chul stays and lives with them. One day, a snake catcher falls under the temptation of Sang-do and is used as a body for dissection. While probing dubious action of Sang-do, In-chul is captured and locked in the basement. He is to become the subject of a live dissection. In-chul had been suspicious of their behavior and investigating when he was caught. In-chul is lying on a surgery table when he escapes with the help of a young hiker and Jin-suk. Sang-do confesses that he had been suffering from nightmares ever since he was dragged off by the Japanese and forced to perform live dissections. These nightmares have made Sang-do a murderer. After his confession, Sang-do kills himself. In-chul and Jin-suk leave the cottage.