Many years ago, the god of the very first ninjas created Order of the Scarlet Shadow and trained countless outstanding ninjas. As the years goes by, beliefs within the order diverged, and the Scarlet Shadow split into faction -the Scarlet Sector and the Shadow Sector. Conflict between the two sector rises over time and they keeps on trying to kill each other rule the Senmei Village - the home of finest ninjas.
Over years, bloodshed of the ninjas of each sector stained the floor of their beloved village and as time passed by the force of defense of the village became weaker and weaker. The two sectors decided that every ten years each sector will choose the strongest ninja that will represent their sector to duel. The ninja who will win will inherit the title "Scarlet Shadow Grand Master - the leader of the two sectors", under whom the two sector would study according to the ninja code left behind by their god, many years ago. The people of Senmei Village are hoping to find the strongest ninja from their village that will unite the two sectors in harmony that will change the ninja world forever. The former Shadow leader brutally killed the leader of the Scarlet Sector during undertaking a mission and returned to assert his supreme dominance to the two sectors. Betraying one's companions is the most unforgiving sin among ninjas according to the ninja code, and the infuriated ninjas of the two sector decided to take action. They sent the most elite ninjas from the two sectors to encircle the Shadow. The ensuing battle was the most chaotic in the Scarlet Shadow's history. The group of the elite ninjas were all slain and the injured Shadow fled from the Senmei Village with his life. This battle weakened the two sectors, bringing shame to both of them and the cracks between factions emerged once gain. In the end the two sectors agreed once more that whoever will catch and kill the disgraced Shadow will become the Scarlet Shadow Grand Master. Since then, each of the ninjas of every sector trained themselves so hard to catch the Shadow.