American sailor Allan Carroll, an American sailor, is shipwrecked of the coast of Japan in the 19th century. He makes it to shore and is rescued by kind Yori. The local ruler, Prince Iku, has ordered that all foreigners who are "trespassing" on Japanese soil should be killed. He hears about a foreign sailor who washed ashore and has been hidden by villagers, so he sends his sister Omi San to investigate. She finds Alan, and instead of turning him in to be executed, she falls in love with him. Prince Iku captures both Allan and Yori and intends to execute both of them. Complications ensue.