Detective Ling Xuan transmigrates back to the Great Jing Dynasty, waking up to find himself in a dungeon, facing brutal torture for suspected treason. He racks his brains to solve the case and successfully joins the Town Night Division. The original owner of this body had mediocre martial arts talent? But Ling Xuan discovers that solving cases improves his cultivation. In this world, there are Buddhist sects saving all beings, Confucianists rebuilding China, Taoist sects achieving immortality, and martial artists fighting their way through the heavens. This book is also known as "Solving Cases Improves Cultivation, Why Should I Learn Martial Arts?", "I Became a God of Crime Solving in the Town Night Division", and "We're All Crude Martial Artists, Why Are You So Excellent?"