Taking place in 1983, Red is a lumberjack who lives in a secluded cabin in the woods. His artist girlfriend Mandy spends her days reading fantasy paperbacks. Then one day, she catches the eye of a crazed cult leader, who conjures a group of motorcycle-riding demons to kidnap her. Red, armed with a crossbow and custom Axe, stops at nothing to get her back, leaving a bloody, brutal pile of bodies in his wake.

A westerner named Casey, studying Ninjutsu in Japan, is asked by the Sensei to return to New York to protect the legendary Yoroi Bitsu, an armored chest that contains the weapons of the last Koga Ninja.