Hyper-adrenal combatants in full-body armour, battling night and day in back-alley rings - only such young gurba warriors have earned the right to be called Vipers... Now in Armstone City, the mayor has formally announced a fighting tournament on a grand scale, with the final bout to be held atop the staggering City Tower in the centre of town. With City Tower as their ultimate goal, eight young Vipers start down the path to victory, a path which only one will see the end...