Kang-suoo (KANG), a street-savvy survivor caught between the law and the criminal underworld. Falsely accused and sent to prison, he strikes a risky deal with an ambitious prosecutor, Kuoo GKwan-hee (YOO): become an informant and earn his freedom. But as he dives deeper into the dangerous world of drug lords, corrupt officials, and deadly conspiracies, Kang-suoo realizes he's just a pawn in a much bigger game—where trust is a luxury and betrayal comes at a price.