After Jisung's mother died, everything changed. All that remained was a house that never felt like home, and a man everyone in the Korean underworld called the boss. Minho's father. A man whose name struck fear into anyone who heard it. Jisung's mother had been part of the same mafia. When she died, Jisung had no choice but to stay under his stepfather's roof - alongside Minho, the half-brother he had hated from the start. Every conversation ended in an argument. Every mission they went on together was a disaster. Minho saw Jisung as an irresponsible brat, Jisung saw nothing but a cold and arrogant mafia heir. They were like two beasts locked in a cage, ready to bite at the slightest opportunity. But in the underworld, you can't survive alone for long. When betrayal begins to set in against them, they are forced to rely on each other. And the more time they spend together, the thinner the line between hatred and something neither of them wants to name. “If you disobey me again, I’ll just let you die in there,” Minho says coldly. Jisung just smirks and takes a step closer. “Then why did you come back for me last time?”