The island of Mata Nui must face one final threat from the evil Makuta: The Rahkshi. The only hope for the survival of the islanders rests with two Matoran villagers, who must find the seventh Toa and deliver him the Mask of Light.

After awakening Ekimu and helping him recover the mask of Creation, the Toa believe they are ready to face Makuta...but the time has not yet come. Each Toa is aligned with one of the island's six elements, but to master those elements they will have to find the masks of Unity...and tame the elemental creatures that protect the masks. Only by completing this quest will the Toa become strong enough to ultimately face Makuta. But a powerful new villain...

In the last episode, the Toa forged new partnerships with the creatures of the elements. And now when the Toa and their Creatures unify...the Toa experience incredible mastery of their elements. But the coming challenge will demand more than just the power of the elements. Just as Ekimu needed his mask of Creation to realize his destiny, his brother Makuta needs his own mask of control before he can awaken and lay claim to the Mask of Ultimate Power....

The Evil Makuta has a master plan. And once Umarak has the Mask of Control, Makuta forces the Hunter to discard his beloved Mask of Shadows and put on the accursed Mask of Control. When Umarak dons the Mask of Control, he transforms into a massive beast...the Destroyer. More frighteningly, he still retains all the cunning of the hunter, but in the form of a massive creature that blindly follows the bidding of Makuta. Now, Makuta intends on turning...