Lu Yuxin, president of Lu's Pharmaceuticals, was kidnapped by gangsters in an underground parking garage, demanding the Lu family's secret medicinal formula. Mysterious expert Liu Qi appeared just in time, easily repelling the gangsters with extraordinary strength and saving Lu Yuxin. Liu Qi claimed to be Lu Yuxin's fiancé and produced a marriage certificate as proof. Although shocked, Lu Yuxin temporarily accepted his protection to cope with the crisis. Lu Yuxin's assistant, Su Wen, fell into a coma from poisoning while protecting her. Liu Qi temporarily saved her life with miraculous medical skills and pointed out that the Lu family's 'Tianji Pill' is needed to completely detoxify her.