Welcome to the Purgatory Wars, where the battle over "harvested" human souls has destroyed Heaven and Hell. Gideon, the most powerful commander in the remaining Legions of Heaven, plans to lead a coup to regain power of his former kingdom. Harvesting his own family from earth, his younger brother Sebastian is tragically killed and unwillingly drafted into the war. Reunited with his brother, Sebastian realizes he holds the key to ending the war, and must face his brother, before Gideon destroys the cycle of life on Earth.