A gripping tale of love, ambition, and tragedy, with four characters whose destinies are intertwined fighting for what they want in the city of Arthdal.

A drama about the love of people who get closer as they learn to be considerate of each other in desperate times and sacrifices made by people who throw themselves into natural disasters.

The drama is a melodrama which depicts the story of a man called Kang Ma-ru who has been hurt by a woman he loves called Han Jae-hee and how he continues his own life by using several women. He sacrificed his well being for his girlfriend only to be dumped by her for another man. Then, he sets off to take revenge on her with the help of his best friend. He approaches Seo Eun-gi, the daughter of the chaebol group executive who lost her memory in order to execute his revenge.

This show is classified as an "urban action variety"; a never-before-seen new genre of variety shows focused in an urban environment. The MCs and guests complete missions in a landmark to win the race. The show has since shifted to a more familiar reality-variety show concept focused on games.

This drama is set in Sungkyunkwan University during the Joseon era, revolving around the exploits and love stories of four youths. When her younger brother falls ill, Kim Yoon Hee enters the school in his place disguised as a boy in her desperation to find a way to support him, and becomes friends with Lee Sun Joon - extremely rich and the brains of the gang, playboy Goo Yong Ha and the rebellious Moon Jae Shin.