Character Arc
Lee Han-shin is the show's center of gravity, a former corrections officer who walks away from prison work, qualifies as a lawyer, and takes a seat on a parole review board. The career change is not opportunistic but personal: he is convinced that a mentor was wrongly disgraced, and the parole post gives him a vantage point from which to trace how a powerful family business empire bends the justice system to its will.
As the series unfolds, Han-shin must balance the formal duties of a parole examiner against the messier work of investigation. He weighs petitions for release while quietly gathering evidence, and he is repeatedly tested by attempts to buy, pressure, or discredit him. His methodical, rule-minded temperament clashes productively with the more impulsive allies he gathers, and the friction becomes a recurring source of both suspense and humor.
Across twelve episodes his arc is one of escalating stakes, as a private quest to right a single wrong widens into a confrontation with entrenched corruption. The role marked a return to leading television work for Go Soo, and the character anchors the drama's argument that even a low-profile official can become a meaningful obstacle to the well-connected.