Entering her third year of marriage, young wife Yuna struggles with unfulfilled desires as her husband is consumed by work, leaving her sexually unsatisfied. Despite this, she finds contentment living with her husband's father. However, her father-in-law, sensing her frustration, takes advantage and forcefully claims her while her drunk husband sleeps beside them. Tormented by guilt, Yuna gradually discovers new pleasures under his domination, becoming increasingly dependent on their forbidden relationship.