Sword and Discipline are the two mafia groups that reside in ‘Black City.’ Jaewoo, a scrap metal delivery man, is raising his little brother on his own. On one of his deliveries, he gets entangled with the mafia boss of Sword- The strong and dangerous ‘Risky’. The unexpected warmth that Risky showed was more than enough to cause Jaewoo to fall in love. However, behind his gentle demeanor was an unknown motive… Jaewoo begins his revenge after being hopelessly betrayed.