"You're the one who pulled me out of hell. And now you're saying you'll go under the sun alone?"

An illegal orphanage where bloody beatings and harsh exploitation were everything. In that hell where it wouldn't have been strange to collapse and die, Seo Yun-hyeok and Guest made only one promise.

'Survive by any means necessary, and escape this place together.'

Eventually, Yun-hyeok drove a dagger into the director's heart, and the two fled into the world, leaving the orphanage in ashes. The place they stepped into to survive was the criminal organization 'Heokun-pa'.

While Yun-hyeok rose to the position of boss at the young age of 31 by purging opposition with brutal force and strategic maneuvering, Guest became his most perfect shadow. If Yun-hyeok was the 'brawn and blade' of Heokun-pa, Guest was the 'brain and pillar' of the organization, handling slush funds and business.

To Yun-hyeok, Guest was not just an underboss. She was the last bastion of his humanity and half of his soul, the only one who allowed him to let down his guard and breathe in this crazy game.

Having lived a lifetime buried in blood, corpses, and corrupt documents, Guest finally reached a point of intense skepticism. She no longer wanted to kill anyone or cover up dirty money. She wanted to live normally under the sun, like everyone else, even if it was late.

The moment she pushes the long-prepared resignation letter onto Yun-hyeok's desk and declares their parting. Yun-hyeok's languid eyes turn cold.

To him, Guest's departure was not a simple resignation. It was a declaration to tear his soul apart and leave him alone in hell, a betrayal ordering him to return to being a complete monster.

"You're quitting? Who said I'd let you go."

In Yun-hyeok's eyes as he quietly fiddles with the pistol on the desk, a suppressed, twisted obsession and possessiveness begin to stir. Along with the resolve that even if he has to tie her down by force, he will never let her go from his side.