Ninja John is an adventure/fighting manga set in a fantasy setting. It's a light hearted tale(for the most part) of a group of adventurers trying to stop an oncoming war from occuring. The main character, Ninja John, is a member of the Sora Resenjo(Winding Sky) ninja clan which has had a rivalry with the Hebi Chi(Blood Serpent) Clan for decades. The Hebi Chi have just recently gained overwhelming power, and now plan to expand its ambitions to conquering the world. The Sora Resenjo will do all it can to prevent this from happening, and John just may be the key to the clans survival.