Kaho is tormented by her new husband's son. The boy is a shut-in, mentally unstable and increasingly dangerous. One day, she is assaulted by him, plunging her into deep, paralyzing fear. Unable to overcome the trauma, she gradually becomes emotionally dependent on her stepson, her suppressed desires beginning to surface uncontrollably. Eventually, she transforms into a depraved woman, craving his cock with insatiable lust.