Xiao Liang returns to Ningcheng after retiring from military service and, through a twist of fate, is forced to live with Qiao Yanran, the eldest daughter of the Qiao family, who has fled her wedding and had her assets frozen by her family. On the surface, he works as a hospital security guard, but he secretly possesses unparalleled medical skills. By chance, he saves the elderly master of the Liu family, earning their respect and admiration. He repeatedly helps Qiao Yanran fight against the villains Wei Chen and Qiao Zhonghai, cures her comatose father, and saves the critically ill daughter of the Yang family. As his enemies hatch one sinister scheme after another, Xiao Liang calmly overcomes every crisis and foils their plots to seize power and harm others. Meanwhile, as he and Qiao Yanran face hardships together, their feelings for each other gradually blossom, and Xiao Liang makes a name for himself in Ningcheng.