When he was five years old, Qing Tian Canggui found a puppy in the parking lot. He named the puppy Gang, and they lived and grew up together. One day he said "Gang, wait for me here, I'll be back soon." Gang, who always obediently waited for his owner to return, disappeared when Canggui went out to buy a cake for the twentieth anniversary of their meeting. when canggui came back and realized, hedesperately searched for a month.