The most wanted mafia group, Los Herederos, is on the move yet again. Deaths after deaths of residents who lived in Apgujeong-dong, Gangnam, proved that Los Herederos now is searching for answers that no one knows the questions to, unless you count the dead, of course. Korean Police Officials are desperate to capture those mafias. With news of their incompetence and people's trusts fading on them, the police are hopeless. Until the Special Violence Unit was established. The SVU's consists of the most elite agents and experienced police officers who swore in their life that they would do anything, to catch Los Herederos.