Hyeong-gu is a detective. He investigates a fire accident site in a country village. The home were the fire accident took place belonged to married couple Soo-hyeok and Yi-young. The married couple died from suffocation. Hyeong-gu senses something suspicious about village residents Hae-kyun and Doo-hee. He investigates the case. One day, he wakes up in the house where the fire accident took place. He finds that his life has completely changed. The house which burned down in his memory, is standing unblemished. The village residents call him teacher instead of detective. His family, house, and job has completely disappeared.