After the death of their parents, three ninjas were taken in by Master Azuma Shiunsai, the leader of Lord Gohda's Azuma Ninja. Having lived his whole life in the hidden world of the ninja, Master Shiunsai gave his new apprentices the only upbringing he could offer - a life in secrecy in a world of shadows, the life of a ninja. One day the three apprentices learned a coup had broken out in the House of Ghoda. As they rushed to the castle to defend Lord Gohda, they learned that lord's uncle, Motohide, had plotted to kill and displace him as the head of the House. They then discovered that a much more sinister plot was in the works. A neighboring samurai lord had deceived Motohide into killing Lord Ghoda, only to seize control away from Motohide once Lord Ghoda was out of the way. During the fierce battle that ensued, it became apparent that this was only the beginning of what would soon become the largest crisis ever to face the Azuma Ninja.