A righteous delivery guy, Zhang Xingxing, accidentally encounters Xiao Wan, the heiress of the Xiao family, who has been drugged. Without hesitation, he bravely saves her from danger. Meanwhile, he is devastated to discover that his girlfriend has been secretly cheating on him with her boss. To his surprise, Zhang Xingxing learns that he is actually the heir to the prestigious Zhang family of Longcheng.