As the great military commander Nobunaga Oda was consolidating his power across Japan, one of his actions was to wipe out a clan of assassins, killing every man, woman and child he found in the village. Years later, one of the survivors has hired a young but skilled assassin to avenge the deaths of his friends and family. His mission: to sneak into the most heavily guarded castle in Japan, and kill the supreme ruler of the country.

As the great military commander Nobunaga Oda was consolidating his power across Japan, one of his actions was to wipe out a clan of assassins, killing every man, woman and child he found in the village. Years later, one of the survivors has hired a young but skilled assassin to avenge the deaths of his friends and family. His mission: to sneak into the most heavily guarded castle in Japan, and kill the supreme ruler of the country.