Tasmania split from mainland Australia around thirteen million years ago, and that isolation is why the island still holds forest lineages tracing back to Gondwana, the supercontinent that once joined Australia, Antarctica, South America, Africa, and India before it broke apart roughly 250 million years ago. The film follows the marsupials that found refuge there after being pushed out elsewhere on the continent, focusing on two animals whose stories run in parallel: the Tasmanian devil, a scavenger that early colonists found unsettling enough to name after a demon, and the thylacine, the striped marsupial predator known as the Tasmanian tiger. One survives as a living relic; the other, hunted to extinction in the twentieth century, survives only in old photographs and a handful of grainy film clips. Footage of Tasmania's rainforest and coastline traces the geological evidence, matching rock formations that split when Gondwana did. The film treats the island itself as a time capsule, and the devil and the tiger as its two most telling exhibits.