In the shadowy world of ancient martial arts tradition, a deadly feud is reborn. Scott Adkins stars as Casey Bowman, an American student of the revered ninjutsu master Togo Igawa. When a sacred weapon, the Yoroi Bitsu, is stolen from their New York dojo by a vengeful former student named Masazuka (Tsuyoshi Ihara), Casey and his fellow student Namiko (Mika Hijii) are thrust into a perilous journey. Pursued by both the relentless Masazuka and corrupt authorities, they must travel to Osaka, Japan, to recover the artifact and prevent its catastrophic power from being unleashed. Directed by action maestro Issac Florentine, this hard-hitting thriller plunges viewers into a high-stakes game of honor and survival. As loyalties are tested and ancient skills are put to the ultimate test, Casey must embrace the way of the ninja to protect those he loves and confront a nemesis hellbent on destruction.