The 2001–2008 Bionicle story arc was set in a world inhabited predominantly by part-organic, part-machine beings (most notably the Matoran) in a subterranean world, which exists in massive domes underground. 2009 began a new saga of the story-line, leaving behind the previous years and venturing out to newer possibilities as Mata Nui, after having been banished by Makuta Teridax, finds his way to a mysterious barren planet called Bara Magna. Here he becomes the center of the story and makes new allies as he tries to find a way to save the Matoran from Makuta Teridax's tyrannical rule.