From the back cover: Face the Evils of Jigoku and Discover the Dark Fate of the Hiruma Family. When a group of samurai pursues a dangerous master of blood magic to the ruins of Daylight Castle, they discover a secret that could redeem or stain the honor of the Hiruma family forever. These samurai must overcome threats to both body and soul if they are going to halt a wicked plot that could bring about the doom of the Empire. Take you players into the foreboding Shadowlands with Mask of the Oni. This adventure for the Legend of the Five Rings Roleplaying Game pits heroes against the dangers of the Shadowlands and the horrors found within the crumbling walls of the Hiruma family's fallen castle. Mask of the Oni includes: A 32-page book with a complete adventure for the Legend of the Five Rings Roleplaying Game. A double-sided fold-out poster map depicting the lands of the Crab Clan, the Shadowlands, and the ruins of Daylight Castle. More than 50 tokens to represent the heroes and villains of your adventures in the Shadowlands.