Persephone is kidnapped by Hades, the God of Underworld, so Demeter, the Goddess of Harvest, turns the earth sterile so she forces Hercules to go to the Other Side and rescue her, or Humanity will perish.
Persphone is taken to his underworld realm by divine Hades, in fact her lover. The earth falls barren as her mother, fertility goddess Demeter, mourns and neglects nature. Hercules perilously enters Hades to retrieve her, must finds she already accepted food there, so a compromise is he last hope.—KGF Vissers