Charlie, a native Chinese pastoral dog (named not by his parents, but by his little master), went to the market with his owner one day, but out of curiosity, he strayed into a container truck on the highway, and accidentally arrived in a metropolis, and then in the vastness of the city. Charlie became a stray dog in the traffic, but he was not alone. In this strange city, he met all kinds of dogs and cats. They also wandered in this city, running around for survival, until one day, Charlie found the way home...