After divorcing her husband, Kyoko indulged her son Hiroaki excessively in an attempt to forget her loneliness. As a result, an abnormal bond developed between mother and son, and now they regularly crave each other's bodies at the vacation home left behind by her late husband. Deep in the mountains, this mother and son appear innocent late into the night, creating a disturbing and shocking scene. Amid the chilly early winter winds, they continue living out their twisted, love-filled days.