The atmosphere at home is ice cold – the husband distracted by an affair with a young woman, the wife sick of her husband’s debauchery, and the teenage son indifferent to them both.
Overwhelmed with hatred, the wife attempts to remove from the husband the organ driving his desires; thwarted, she instead takes out the violent act on the son and then disappears into the night.
At the hospital, the husband is distraught with guilt, severing his own manhood in solidarity and setting out to recover his son’s happiness, sacrificed to his parents’ conflict.
Disfigured in such a radical way, the son slowly deviates from normal life, even falling for the husband’s young mistress as the husband discovers strange and severe ways to help his son find pleasure again.
With both husband and son damaged and living in grief, the wife returns as the family heads towards destruction even more horrific than before in the South Korean horror movie Moebius.