Set in 1920s Shanghai, the story follows Lu Yao, a brilliant but eccentric young man who has just returned from studying abroad in the UK. With an IQ that makes him a genius and a penchant for trouble, he is recruited by Qiao Chusheng, a righteous and capable police inspector, to serve as a consultant for the Shanghai Municipal Police. Together with Bai Youning, a courageous and idealistic newspaper reporter, the trio forms an unlikely alliance to solve a series of bizarre and seemingly impossible murder cases. As they navigate the complex social landscape of Republican-era Shanghai, the team uncovers deep-seated conspiracies and corruption. Lu Yao’s sharp deductive skills are constantly tested against the city's dark underbelly, while his growing bond with Qiao and Bai evolves from professional necessity into a deep, loyal friendship. The series blends lighthearted banter and comedic chemistry with suspenseful investigations, capturing the vibrant yet dangerous atmosphere of a city in transition.