An accountant visits her daughter who is secretly living with her boyfriend who is a fraud. She is surprised by what she sees and hears. Soon, a dangerous cohabitation begins with her daughter's lover.
Dong-hoon is a detective who only has eyes for his foster daughter Yoon-ji. However, she's unemployed and only likes to party. One day, she brings her friend Hye-ri home. Hye-ri doesn't leave and acts as though she lives there, even bringing her boyfriend into the house for some adult playtime, tempting Dong-hoon.
A woman who seduces her dissatisfied stepson with her body as she tries to become a new mother for him. A friend's son who shoots a pillar of fire at his sexy friend's mother. A father-in-law who replaces his indifferent son with himself to his daughter-in-law. Secret and covert love affair stories begin.