The Fifth Sun is the story of three Italian filmmakers attempting to film a documentary on Wanderlust, the eternal need to travel and to feel like a vagabond.
They decide to follow Panu, a Finnish traveler, on a road trip from Helsinki (Finland) to Cairns (Australia), chasing a full solar eclipse. They start their journey by land, without a plan, letting Panu wander towards Australia.
A week before the eclipse something goes wrong, but what seems to be the failure of the documentary turns out to be its only possible ending.

The meta-narrative of The 5th Sun is the final twist for the resolution of the documentary.