In the world of dreams the rules of reality do not necessarily apply. Each dream is unique and it's a direct link to the soul and spirit. Psychology provides its own theories on what dreams mean, but so did tradition and the study of dreams for thousands of years before any relevant science had developed.
Dream Meanings - Enemies
If you dream of people who have animosity towards you, be careful as you will experience troubles. If you are chasing your enemies then you will manage to get out of a difficult situation.