Qin Ming, a master of mecha deception, is recruited by the puzzle-solving expert Bai Qi to join the prestigious Jinwu Guard, serving as a firefighter in the Fire Protection Division. During the investigation of a mysterious thunder and fire case, Qin Ming encounters Jing Yifei, the renowned "first sister" of the Bingma Division. Together, the trio forms an elite detective team. As they delve deeper into their investigation, they must navigate through layers of enigma and danger. Along the way, they uncover hidden truths about their own pasts and the profound responsibilities and significance of their roles as Jinwu Guards.