On a stormy night, delivery rider Lu Xiaoman receives a bad review claiming that the food gave the customer heartburn. Furious, he is just about to file an appeal when a mysterious order suddenly appears on his phone, requesting delivery to the Lingxiao Palace. From then on, he delivers across the human world by day and the Three Realms by night: bringing longevity peach cakes to the Queen Mother of the West, milk tea to the Dragon King, serving as a designated driver in the Underworld, and selling slow-moving peaches on Flower and Fruit Mountain. With rival businesses in the immortal realm secretly sabotaging him and his human-world manager constantly making things difficult, he relies on nothing but his own two legs and a friendly smile to earn five-star reviews across the Three Realms, becoming the first delivery rider to serve all three realms.