Synopsis: K the Cleanskin

A fierce revenge story of a man whose loved one was stolen from him. Kim Jin, also known as "Cleaner K," works as an agent for the National Intelligence Service. While on a mission overseas, he receives news that his beloved daughter Sui has been hospitalized after being sexually assaulted. Furthermore, Sui, unable to bear the mental shock, is finally driven to commit suicide. The fierce revenge story of the strongest cleaner who lost everything he loved begins.