Violinist Yoonjae drifts through life, attached to nothing and no one. Until the unanswered calls. Until his only friend’s suicide. Guilt-ridden, Yoonjae’s world collides with Woojin—a sharp-eyed prosecutor and the very man his dead friend was obsessed with. He tries to push him away, but a violent twist of fate forces Yoonjae to accept the prosecutor's help. Tangled in a web of debt and dangerous attraction, Yoonjae is drawn closer to the one person he should never have met. Is this man his savior, or the architect of his ruin?