Takanuva, a Toa who wears the Mask of Light, comes to the aid of a village trying to defend itself, but in his haste to help them, he makes a mistake in identifying who the real invaders are.
When a strange toxic gas permeates Eternia, ravaging farmlands and endangering citizens, Adam, aka He-Man, and his friends embark on a dangerous quest to find a legendary figure who might hold the key to stopping the devastating stench.