Based on Lee Sun-mi's novel Love Story in the Capital,[1] the story juxtaposes the heroic anti-Japanese movement with young romance by depicting the capital Seoul of the 1930s during colonial rule, at that time called "Keijō" ("Gyeongseong" in Korean; hence its alternate title Scandal in Old Seoul).

It was a time when the nation's independence fighters fought against pro-Japanese traitors, while traditional Joseon-era Confucian values clashed and coexisted with a more modern way of life.

The series portrays one of the darkest periods of Korean history with a mixture of tragedy, comedy and romance.

He gambles with his colleagues on his ability to seduce Na Yeo-kyung (Han Ji-min), whose nickname is "Jomaja" (the last woman of the Joseon period).

At first Wan doesn't take his bet seriously, but as events escalate in the capital, he finds himself falling in love with Yeo-kyung.