After his Japanese mother dies, a biracial young man travels to the United States to track down his American father.

Learning that his Japanese mother committed suicide after being abandoned by his American father, young Yukio journeys to the United States to have his revenge. However, his plans are complicated when he inadvertently ends up working for a network of spies who want to get their hands on some important documents possessed by none other than Yukio's long-lost father.—cupcakes