Recca is just an ordinary high schooler... who really really likes the art of ninja. He's not a bully, but he gets into enough fights. His main rival is Domon, and also Fuko, who are both determined to beat this hat wearing punk. Course it'd be too easy for life to stay just like that, wouldn't it?

A girl named Yanagi is almost killed in a construction site accident, but Recca manages to save her! How? Well, that part isn't precisely known... but then this weird woman shows up and starts attacking Recca and Yanagi and- Recca shoots flames out of his hands!? Well, that's definately not normal. Recca desides that no matter what, he'll protect Yanagi (who he deems his hime, or princess), learn how he can control fire and figure out who this evil woman pestering him is.

As the series progresses, Recca and others learn to use special powers, mastering ancient magic imbued weaponary. Recca himself learns much about his past and the situation at hand, which threatens the existing world, and more pointedly his and his hime's lives! Who are friends? Enemies? How many of these magic weapons were made, anyway? Can they really topple the evil plot looming over the Earth? Recca's team intends to find out, and it seems they'll have to beat out a path for themselves.