Based in Shinmiyangyo, or the U.S. expedition to Korea in the late 19th century, Mr. Sunshine tells the story of a Korean boy born into a family of a house servant running away to board an American warship, later to return to his homeland as a U.S. marine officer. He ironically falls in love with an aristocrat’s daughter and discovers the dark scheme to colonize the country that he once ran away from.
Joseon stands firm against U.S. incursion. Yu-jin survives in America -- as Eugene. Ae-sin knows that great change is afoot with global ramifications.
The empress has been murdered: For Ae-sin, words are useless against rapacious foreign powers; she’ll take up arms instead. Eugene gets a new post.
In an age of imported coffee and fashions, Ae-sin prefers her German gun, but wonders what the English word “love” means and whether Eugene is a friend.
Suspicions run deep as U.S. troops lose a gun on a train. Ae-sin shows Dong-mae compassion, Hui-seong returns to Joseon, and Eugene considers revenge.
Ae-sin meets Hui-seong for coffee at the hotel. Eugene deals with Japanese troops at the U.S. legation, and wants to know why Ae-sin defends Joseon.
Ae-sin gets a new mission. Eugene, Dong-mae and Hui-seong have something in common. Eugene delves into his past, and finally gives Ae-sin his answer.
Ae-sin learns love’s real meaning and crushes a thug. Emperor Gojong asserts Joseon’s authority. Eugene reveals his Korean name to Ae-sin.
Despite being advised to lay low as a noble lady, Ae-sin undertakes a dangerous operation. Eugene makes a surprising move and Hui-seong probes his past.
Eugene wants to know why Ae-sin can’t pull back, but her path is with the Righteous Army. Hui-seong disagrees with Ae-sin and offers an alternative.
The emperor seeks Eugene’s aid. Hui-seong visits the tailor. Ae-sin feels conflicted after hearing Eugene’s story, but later sees him on a snowy night.
Ae-sin apologizes to Eugene, but he hopes that she’ll keep fighting for her Joseon. Hui-seong takes a streetcar ride with Ae-sin and proposes a plan.
Reaffirming her commitment, Ae-sin stands by her decision. While she makes an unexpected pact over castella cake, Eugene investigates an old photograph.
Ae-sin and Eugene take a ride out to the sea. A nefarious scoundrel takes great interest in Hui-seong and Eugene. Lord Go Sa-hong meets with Hui-seong.
Eugene gets devastating news, Dong-mae is apprehended, Ae-sin asks Hina for help and Hui-seong comes to the rescue when Eugene finds himself cornered.
A disquieting sight vexes Emperor Gojong. Ae-sin defies Lord Go, Eugene refuses to forgive, and Hui-seong visits the Go family estate.
Hui-seong starts a newspaper and makes a personal sacrifice. Lord Go marshals support, Ae-sin imagines a different life, and Eugene goes to the palace.
After giving up that which means the most to him, Hui-seong gets a friend a gift. Lord Go leads an urgent appeal, and Ae-sin faces Japanese troops.
Eugene contends with a viperous imperialist. Seeing Lord Go’s incarceration, Hui-seong publishes a special edition. Ae-sin snubs a Japanese official.
Lady Ae-sin loses a part of herself. Lord Go counters mounting imperialist schemes, Hui-seong avenges Ae-sin and Emperor Gojong strikes down a snake.
The Righteous Army retaliates against Japanese troops and Ae-sin seeks justice. War breaks out in Joseon -- and Eugene gets orders to return to the U.S.
Called an American imperialist, Eugene later asks Ae-sin why she persists in a futile cause. Hui-seong helps Ae-sin out of a bind. An ally joins Ae-sin.
Emperor Gojong tries to shield the nation but is thrust into an impasse. Finding herself behind the eight ball, Ae-sin concedes that words have power.
Seeing the explosion, Hui-seong, Dong-mae and Eugene fear the worst. The world’s indifference dismays Emperor Gojong, but Joseon’s defiance gets bolder.