During the summer when they are eighteen, wealthy young heir Tang Yu makes a bet with his family and puts on a helmet to spend his days delivering orders all over the city. By chance, he meets the cool and aloof An Zhiyu. He thinks she looks familiar but fails to remember that she was his childhood sweetheart ten years ago. She recognizes him at first sight, yet can only test the waters with a cold expression and secretly get closer to him. From delivery partners to hotpot-stall business partners, amid the steaming bustle of everyday life and their awkward daily struggles, they reconnect the thread that was severed ten years ago, inch by inch. How should they spend this summer to make it truly unforgettable?