An erotic film about a husband who suffers from erectile dysfunction due to intense sex. Ha-seon and Do-hoon, a couple who love sex, enjoy sex all the time, to the point that Do-hoon’s ‘stuff’ breaks due to too much intense action. After the accident, Do-hoon’s ‘stuff’ has not been as good as before, and Ha-seon is getting tired of her unsatisfactory sex life. Do-hoon, who was frustrated at being impotent, accidentally found his father, Tae-bong, having sex with Ji-seon, his stepmother. And when he saw it, Do-hoon’s stuff’ rose again. In the meantime, Ha-seon accidentally sees Tae-bong’s ‘stuff’, and she, who is so hungry for some action, had sex with his father-in-law. Later on, Do-hoon desperately tells his father that he wants to have sex with his stepmother, so Tae-bong sets up his son and Ji-seon to sleep together.