Ryu Sio or Sio is a sleek and devilishly handsome man of great wealth. His posture and physical movements all speak to his confidence that’s mostly borne out of his privileged status. He's a CEO of distribution company named Doogo.

He’s also not a man of that many words. He can speak when he wants to, and he knows how to as well.

This is demonstrated when he addresses the people during the company meeting, rattling off his plan for the company’s way forward.

This plan focuses on making Korea get hooked on drugs again, and he’s invested in one very diabolically potent drug, which is shown to have been created by a scientist in a very expensive, high-tech lab using what looks like very advanced science and technology.