Set in the early 1900s, this drama tells the story of a young man from Korea who grows up in the United States. When he returns to Korea as a US Marine Corps officer, he meets and falls in love with a noblewoman who is fighting for Korean independence. Their romance is complicated by social class and political ideology.

During the Japanese colonial rule of Korea, a Korean surgeon who was raised by a Japanese family becomes a spy for the Korean government.

During the Japanese occupation of Korea in the 1930s, one of the darkest periods of Korean history, heroes came from ordinary men who did extraordinary things in their everyday lives. Lee Kang To is one of those men. A skilled martial artist, Kang To actively participates in the independence movement to fight against the Japanese imperialist regime. He is known as “Gaksital” because he hides his true identity behind a rosy-cheeked traditional bridal mask, known as a “gaksital,” when he fights against the Japanese. But can one man do enough to right the wrongs of a terrifying national enemy?

The drama evokes the spirit of love between the country and the nation of Ahn Jung-geun, a young man who went through a turbulent period of enlightenment between the late 1800s and the early in the 1900s.