Cacao and Milk are chosen by the World of the Happiness to protect the forces of the good and evil. Their mission is to stop Kotuka and Karaka whose aim is to enter the children’s minds and spread evil.
Cacao and Milk often give messages about being good by focusing on concepts such as love, sharing, helping, compassion, tolerance, justice, trust and sometimes they try to focus on evil emotions such as jealousy, hatret, selfishness, arrogance, unfounded doubt, anger to help children properly differentiate between these concepts and learn to find and use the good within them while avoiding the evil.