Rika married an elite husband but lives under constant pressure from her mother-in-law, Yone, who warns that any failure in their child’s entrance exams will be blamed on Rika’s vocational-school background. With the exams consuming her thoughts, Rika answers the door one day to a salesman with an unsettling smile. He claims his product can solve her worries about her child, and his sweet promises gradually draw her into brainwashing and hypnosis...