Every night, all human dreams are played out in Nightopia and Nightmare, the two parts of the dream world. In Nightopia, distinct aspects of personalities are represented by luminous colored spheres known as "Ideya", which give energy to the dreams. However, the evil ruler of Nightmare, Wizeman the Wicked, is stealing this dream energy from sleeping visitors, in order to gather power to take control of Nightopia and eventually the real world. To achieve this, he creates numerous beings called "Nightmaren", including three acrobatic jester-like, flight-capable beings called Nights, Reala, and Jackle. However, Nights is good and rebels against Wizeman's plans, and is punished by being imprisoned inside an Ideya palace, the machine like containers for the Ideya of dreamers, in the center of Nightopia.
