When Prince Adam regains control of Zwaard der Macht after 15 years, it leads him back to his home world of Eternia. Upon arrival, he discovers that Eternia is suffering under the cruel rule of Skeletor. To save his family and his world, Adam must work together with his loyal allies Teela and Man-At-Arms Duncan, and he will have to fulfill his calling as He-Man, the most powerful man in the universe.