The film tells the tale of the heroic Toa Metru returning to their island city home of Metru Nui to rescue its populace the Matoran, all of which remain in a deep coma. But upon arrival, the heroes discover their once beautiful island home has been destroyed and overrun by webs created by spider-like beasts called Visorak, who capture the Toa and poison them, mutating their form into a half-Toa, half-beast state; Toa Hordika. With the aid of the Rahaga, they begin a quest to find the legendary Keetongu in order to find a way to change back into their original Toa forms to rescue the Matoran, who were being held by the monstrous Visorak hordes and their king Sidorak and viceroy Roodaka.
