The story begins with the puppy Oreo living in a warm family. However, due to an accident, Oreo left home and began a long and hard wandering life. On the way, he met many different people and animals, some friendly and some malicious, and they also left different impressions on Oreo.

In the process of wandering, Oreo kept looking for a new home and experienced many hardships and struggles. Finally, he found a sense of belonging and a harbor of love in a human family and lived a happy life.

This novel tells about the difficulties of stray animals through the experience of a puppy, and also reflects the attitudes and problems of human society towards stray animals. It appeals to people to care and take care of stray animals so that they can live a happy life.