William Walker, a seasoned detective with twenty years of police experience, is a three-time consecutive champion of the arrest and combat competition at the Tiannan Provincial Police Academy. By a twist of fate, he is reborn twenty years in the past, just after graduating from the academy and starting his career. From then on, he displays extraordinary prowess—no matter how major, bizarre, mysterious, or cold a case may be, in front of William Walker, nothing is difficult and every case is solved instantly! If you are a criminal, no matter how fierce, cunning, or formidable you are, you cannot escape once you fall into William Walker's hands! Detective Captain Captain Walker of Border City specializes in dealing with all kinds of defiance! Not convinced? Bring it on!