She is a criminal psychologist, and her patient, Ём Сокхи, turns every conversation into a game of chess, where her sanity is on the line. While the crowd demands an execution, a monster locked in a cell is setting up the final move that can crack the familiar world. Will Суён manage to stop what cannot be calculated?
For everyone, Ём Сокхи is a merciless creature; for the criminal psychologist Сим Суён, he is the most dangerous case of her entire career. She is tasked with looking into the mind of a murderer and obtaining a confession to seventeen crimes. But the official assignment rapidly transforms into a personal nightmare.
Суён begins to understand: the interrogations are only a fragment of Сокхи’s carefully planned game. While society hungers for retribution, he—awaiting the execution of the sentence—prepares his last and most audacious crime, and its consequences will reach far beyond the prison walls.