A ninja named Ryu Hayabusa finds a letter by his recently missing father Ken telling him to go to America and meet with an archaeologist Dr. Smith. Dr. Smith tells Ryu that two statues hidden by Ryu's father and the doctor have the power to end the world – if united. Ryu ends up in South America and battles Jaquio an evil cult leader bent on reviving the ancient demon called "Jashin" and responsible for the attack on Ken Hayabusa.