Hwang Shi Mok underwent brain surgery as a child to curb his violent temper, which left him devoid of emotions. Hwang becomes a prosecutor known for his piercing intelligence and logic, but he is ostracized because he lacks empathy and social skills. He is also one of only a handful of upright prosecutors who have refused to take bribes. One day, he encounters a stabbing victim while investigating corruption. He meets Lieutenant Han Yeo Jin at the crime scene. They join forces to root out corruption at the prosecutors’ office and solve a serial murder case.

Filmed over one year, this four-part series reveals the spectacular beauty of England's largest forest, Kielder, as it changes through the seasons. Situated in one of the wildest and most remote parts of the country, it's home to some of Britain's greatest and most secretive wildlife, from red squirrels to pine martens, feral goats to water voles and a variety of birds of prey. Despite its rich collection of wildlife, Kielder Forest didn't even exist one hundred years ago.