Hundreds of years ago on a planet once ravaged by war, the nations swore an armistice never to use weapons of mass destruction again. Today, battle-hardened warriors known as Grievar Knights train to represent their nations' interests in brutal hand-to-hand combat. Murray Pearson was once a famed Knight until he suffered a loss that crippled his nation - but now he's on the hunt to find and train the next champion. Below, in the Underground's brutal combat rings, an orphaned boy called Cego is making a name for himself. Murray believes he has what it takes to make it in the planet's most prestigious combat school - but he has to fight his way out of the Underground first.