When Johnny Clay (Antonio Sabato Jr.) and his gal pal Jane Logan (Shannon Lee, daughter of martial arts legend Bruce Lee) pull off a bank heist, they accidentally uncover a money laundering front created by the local Mafia.

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.

The tough and cold mercenary Warchild, is working for the man who took care of his war training and upbringing, the greedy General Ruechang. Ruechang is planning to take over the country by marrying Princess Halo. But Halo discovers that Ruechang killed her father to gain more power than he had working for the King, so she decides to run away. Warchild is the one who has to bring her back to Ruechang, but the one thing no one counted on happens... Warchild and Halo falls in love, and together they take on the forces of Ruechang...