In a besieged land, Beowulf must battle against the hideous creature Grendel and his vengeance seeking mother.

7 years on from the original Fortress movie, Brennick and his family are still on the run. Finally, they give in, and surrender, only to find themselves imprisoned in a new, more sophisticated fortress prison in outer space. But Brennick’s not a man to give in easily, and with a 10 year old son waiting for him back on earth, he’s going to pack some serious assault on the evil corporation.

Three unknowing martial artists are summoned to a mysterious island to compete in a tournament whose outcome will decide the fate of the world.