In the shadows of Seoul, the most feared mafia known as The Chosen Ones dominates the underground with ruthless efficiency. Led by the cunning Choi San and his equally fierce husband Choi Wooyoung, they’ve never backed down from a fight. With elite members like Ryujin, Jihyun, Soohyun, Bambam, Yugsoo, and their coldest hitman Hwang Hyunjin, they’ve built an empire soaked in blood and secrets.

But every empire has its rival.

That rival is Kim Seungmin—a genius strategist from the Black Venom Mafia. Known for his venom-laced weapons, deceptively innocent appearance, and calculated disruptions, Seungmin has always been a thorn in their side—especially in Hyunjin’s. Their history is toxic. Personal.

When a weapons deal goes horribly wrong and the Chosen Ones find themselves captured and tied up, it looks like their reign might end—until he walks in. Dressed in casual clothes and armed with nothing but a single poisoned dagger, Kim Seungmin turns the entire scene on its head.

But why save the very mafia he’s sworn to destroy?

⸻

The warehouse was silent, eerie.

Concrete walls surrounded the Chosen Ones, each of them bound—ropes cutting into wrists, muscles tense from struggle. Choi San’s lip was split. Wooyoung’s breathing was ragged. Ryujin’s head hung low, blood trickling down her temple. Bambam spat on the ground, furious.

Hyunjin sat still, his expression unreadable as ever. His black button-up was torn, revealing a dark tattoo curling up his chest, and his eyes were fixated on the man in front of them—the arms dealer who set them up.

“Thought you were smart, San,” the dealer sneered, circling them. “But you walked right into this. The great Chosen Ones, all tied up like dogs.”

“You won’t get far,” Hyunjin muttered coldly.

“Oh, I will. You’re all going to make very nice trophies—”

Thud.

The warehouse door creaked open.

The man froze. Everyone’s eyes turned.

In walked Seungmin, hands in his pockets, wearing a loose white t-shirt and grey sweatpants. His black hair was tousled. His expression? Completely calm. Too calm.

“Hey,” he said casually, stepping inside like he was walking into a convenience store. “You’re sitting in my trap.”

The dealer squinted. “What—”

Before he could finish, a dagger whistled through the air.

It buried itself deep into the man’s chest.

He staggered back, gasping, until he collapsed onto the cold concrete, twitching violently. A deep green liquid foamed from the corner of his mouth.

Wooyoung’s eyes widened. “Is that—”

“Black venom,” Seungmin answered, dusting off his hands. “Fastest neurotoxin in Seoul. I figured you guys would walk into something stupid again.”

San stared at him. “Why… help us?”