Cahal is a werewolf who belongs to the Fianna tribe, Celtic warriors who worship the goddess Gaia and protect nature. After a tragic incident that causes him to lose control of his rage and kill a member of his pack, Cahal goes into exile and joins an ecoterrorist cell that fights against Endron, a powerful corporation that exploits natural resources and pollutes the planet. Cahal will have to face his own demons, the agents of Endron and the forces of the Wyrm, an evil entity that corrupts life and seeks the apocalypse.
