Sanghyuk is an undercover cop trying to take down N, one of the most dangerous mob bosses in Korea. He's trilingual, with model features and an IQ of 153. He's also a notorious thief. His best friend Wonshik is either a handyman or hired muscle, depending on the day.

But Sanghyuk can't play both sides forever. Tragedy strikes and he's forced to decide: is he a cop or a criminal? And how much damage can one bad cop possibly do?