The story begins with the legendary origin of the Toa, a group of Matoran youth chosen from Metru Nui to become physically transformed and empowered with super heroic abilities. Despite their new forms, the Toa struggle to master their powers, navigate their relationships, and prepare to defend their home.

Bionicle 2: Legends of Metru Nui
In a world where legendary guardians are reborn, six ordinary Matoran are transformed into Toa, tasked with protecting Metru Nui. However, their newfound powers are soon threatened by internal conflicts and a hidden menace.