Min-gyu gets fired after being caught having secret sex with a female coworker at the office. Unable to work in that neighborhood anymore, he decides to stay at his older brother Min-seoks house for a few days to look for a job. However, there he finds his defenseless sister-in-law, Seo-hyun. Min-gyu discovers that Seo-hyun works at a massage parlor and begins to blackmail her…