NINJUTSU IS THE ANCIENT WAY OF INVISIBILITY. WHAT DOES IT HAVE TO DO WITH THE STRANGE PROBLEMS AT YOUR FRIEND NADA?S AIKIDO DOJO? Ominous things are happening at the dojo of your good friend Nada?powerful thunderstorms in the middle of dry season, objects that seem to move by themselves, piercing sounds coming from empty rooms. Nada traces it all to the arrival of a samurai sword from an anonymous benefactor. The sword has highly unusual and distinct carvings on its hilt. Nada feels the dojo is under attack and the sword has something to do with it. You use your years of aikido practice to...