Kimiko returned to her hometown accompanied by her son, Takashi. The house was occupied by her younger brother, Takeshi, and contained a storehouse sealed by a heavy, ominous door. The eerie structure seemed to radiate an almost supernatural force. Takashi began to feel an inexplicable attraction toward his mother, an emotion that intensified each day. One night, as he lay in bed, he overheard a secret conversation between his mother and Takeshi. Gradually, the forbidden relationship between this brother and sister—hidden beneath the surface of familial bonds—was revealed.