The drama is set in 1900 to 1905 and tells the story of a US Marine who falls in love with an aristocrat's daughter, who is covertly in the Righteous Army. The story begins in 1871 when the hero escapes Korea onboard an American military ship with an American missionary. The story is revealed as the boy remembers his migration during the Shinmiyangyo, a U.S. military expedition to Korea that resulted in a battle. He lands in the U.S. and 30 years later returns to Korea as an American soldier, to the country that abandoned him. While stationed in Korea, he meets and falls in love with a nobleman's daughter.