Baek Heon, the ruthless CEO of the criminal syndicate Yusu, finds himself under investigation by prosecutor Seol Jihun for allegedly plotting to assassinate a congressman. Inside the interrogation room, Baek Heon becomes instantly captivated by Jihun and makes a chilling decision. If he’s going to hell, he’s taking this good-looking prosecutor down with him. Jihun’s life is soon upended. Framed for crimes he didn’t commit, he ends up behind bars, his once-promising future shattered. But Baek Heon isn’t done yet. For a man who confesses his deepest desire is to ruin a prosecutor, he’s more than ready to drag Jihun into his world of obsession and poison—and Jihun might just be daring enough to see how far he’ll fall.