Soo-hyuk - an elementary school teacher in a village, at night his wife, Ms. Yi-young, always turns into a different person. Then one day they were discovered, the villagers became alienated and locked them up
Hyeong-Goo (Cho Jin-Woong) is a detective. He investigates a fire accident site in a rural village. The house where the fire happened belongs to the couple Soo-Hyeok (Bae Soo-Bin) and Yi-Young (Cha Soo-Yeon). The couple died of suffocation. Hyeong-Goo senses something suspicious about the villagers Hae-Kyun (Jung Hae-Kyun) and Doo-Hee (Jang Won-Young). He investigates the case.
One day, he woke up in the house where the fire happened. He found that his life had completely changed. The house burned down in his memory, still standing untouched. Villagers in the village called him teacher instead of detective. His family, his house and his job were completely gone.