Luo Jun is an ordinary security guard, but also the most extraordinary one, bar none! In the bustling city, Luo Jun uses his superb skills and extraordinary intelligence to navigate the urban jungle. Against strong enemies, he uses his fists. Against cunning enemies, he uses his wit. However, when faced with the beautiful and mature divorced female landlord, the intelligent and icy CEO sister, and the valiant policewoman sister, and their intertwined web of relationships, Luo Jun's fists and intelligence fail him? In this world of mortals, I cannot break free!