Spartakus and the Sun Beneath the Sea (1985)

In the future, a race of people called Arcadians lived in the center of the Earth after a catastrophe hit the surface. At the center of the Earth, the Arcadians had an artificial sun called Tehra. Over time, Tehra started to degenerate and die. A messenger named Arkana was sent to the surface to find help, where she encountered a warrior by the name of Spartakus. Spartakus vowed to help Arkana to find a cure for the dying sun Tehra and save the Arcadian people.