Gaia, Mother Earth, is dying. Troubled by humanity's insatiable hunger, she is losing the battle against the Wyrm, a cosmic force of decay and destruction. Manifested in the Endron corporation, the Wyrm's servants are ready to feed on nature's very corpse.

A former protector of Gaia, born under a full moon, and a proud werewolf warrior of the Fianna tribe. However, after losing control of his destructive rage, Cahal chose a life of exile. Years later, while searching for his missing daughter, Cahal discovers that his old pack is in danger and must help.