The story begins with six Toa Mata: Tahu, Lewa, Gali, Kopaka, Pohatu, and Onua, arriving on an island known as the Island of Mata Nui, remembering nothing beyond their names. They discovered that the inhabitants, the Matoran villagers, face constant attacks from infected Rahi, savage beasts controlled by the powerful influence of Makuta Teridax through use of Infected Kanohi masks, causing a war which lasted about 1000 years. After searching for and finding numerous Kanohi masks, the Toa each receive a Golden Kanohi mask with tremendous power and seek out Makuta himself. After challenging the ferocious Manas crabs and the Shadow Toa (evil doppelganger-like illusional replicas of the Toa ), the Toa confront Makuta and defeat him by uniting their elemental powers.