As a child, Hwang Shi-Mok underwent brain surgery that left him devoid of emotions. Currently, he serves as a prosecutor, known for his logical yet aloof and solitary nature. Remarkably, he stands out as one of the few prosecutors untainted by corruption. His life takes a turn when a corpse is unexpectedly placed before him. At the murder scene, he encounters Police Lieutenant Han Yeo-Jin. Together, they join forces to eliminate corruption within the prosecutor’s office and unravel a series of murders.