On a trip to Japan in 1595, Dawk Faraday finds himself befriended by an
unpredictable, possibly crazy mountain monk who swears he is being
hunted by a demon called a tengu. His sister Hype, meanwhile, bonds with
a female samurai who offers her training. These two worlds collide when
encounters with demons begin to plague the entire castle town, drawing
the Faradays into a multi-century mystery.