Zhang Qingshan is the grandson of the Divine Fist Zhang Wanshan. To repay a favor for his grandfather, he enters the city to become a bodyguard for Bai Wanqing. With a rustic exterior and corn cakes in hand, he bursts into high society, only to face harassment from the Bai family members right upon arrival. Little does anyone know that he possesses true skills: with astonishing hearing, he roots out a wiretap, easily knocks down bad guys, and defuses every crisis. Step by step, he transforms from a mere bodyguard into her strongest backing.