A woman with a gift for lying is employed by a chaebol heir to act as his long-lost cousin. To keep up the charade for his family, the two must live under the same roof, but their growing attraction to each other poses a problem for pretending to be relatives.
Infinite Challenge has been reported as the first "Real-Variety" show in Korean television history. The program is largely unscripted, and follows a similar format of challenge-based Reality Television programs, familiar to the audiences in the West, but the challenges are often silly, absurd, or impossible to achieve, so the program takes on the aspect of a satirical comedy variety show, rather than a more standard reality or contest program. In order to achieve its comedic purposes its 6 hosts and staff continuously proclaim, the elements of this show are the 3-Ds, Dirty, Dangerous, and Difficult.
Lee Mong-ryong is transferred from Seoul to a high school in Namwon, North Jeolla Province. Chun-hyang does her best to help Mong-ryong, her first love and the son of the Namwon Police Station chief, to enter a prestigious university. However, after meeting with Mong-ryong’s first love, Chae-rin, Mong-ryong’s love toward Chun-hyang is shattered, although Chun-hyang’s love remains unwavering.
In a bid to reacquire her childhood home, a free-spirited woman agrees to a sham-marriage with a selfish actor. Their daily lives are complicated by overlapping love triangles and comic misadventures.