The daily life of a female teacher appears calm and ordinary at first glance. However, behind her back, her husband, an elite teacher who works at the same school, continues to torture her with sadistic sex. Her husband played exam questions to violent students and played with the female students' bodies in return. When the female teacher goes out into the city at night to say goodbye to the ugliness and dirt hidden in her school and husband, she finds human liberation and a new way of life.