Employing the latest in filmmaking techniques, this film follows the fascinating 800km migration of the Bogong Moth, one of the longest of the insect marathons. In their billions they ascend, climbing high into the jet-stream which carries them south. Navigating by the light of the moon, these moths cover hundreds of kilometres in a single night. But the survival test has only just begun. Over the coming days, weeks and months they must battle other creatures, weather, humans and time.