12 contestants face off in games of wit, strategy and wisdom over 6 nights and 7 days. Who will be crowned the ultimate victor?

A homicide squad detective, suspected of serial murder, searches for the real culprit.

Lee Jae-in (Ha Seok-jin), a ruthless son from a wealthy family starts seeing an elementary school teacher, Kim Da-hyun (Jeon So-min) whom he has never seen before, on a six-month contract engagement, so that he could inherit the asset as written on his grandfather’s will. '1% of Anything' is a romance drama depicting what happens to the pair during the fake engagement.