Bionicle 2: Legends of Metru Nui

BionicleLegends of Metru Nui is the second film in the Bionicle series and is a prequel to Bionicle Mask of Light. This movie follows the 2004 storyline and was created using Lego elements from the Bionicle series, and was released as a directtoDVD. It is also the last film in the franchise to be given a rating by the MPAA.

The film begins with Turaga Vakama describing a land that existed before Mata Nui called Metru Nui. The residents of the great city believed that the warriors known as the Toa would protect them, but eventually they fell one by one, defeated by an unrelenting shadow that sought to conquer the city.Lhikan, the last remaining Toa, travels throughout the entire city, giving Toa stones to six Matoran Whenua, Nuju, Matau, Onewa, Nokama, and Vakama. After giving the last stone to Vakama, Lhikan is captured by two Dark Hunters called Nidhiki and Krekka. Vakama later meets the other Matoran at the Great Temple in GaMetru there, they are transformed into six new Toa. After Vakama has a vision, they all set out to recover the six Great Disks hidden throughout Metru Nui, hoping to prove to Turaga Dume, the citys leader, that they are worthy Toa. ........

Source: Wikipedia