Racing to reach the crashed freighter before sunset, the Discovery's crew reaches the Mare Australis, the plain north of the ice cap. After nightfall, though unable to find the freighter, they see a mysterious white light moving across the plain. In the morning, they locate the crashed freighter, but upon reaching it find its crew missing. However, there are strange marks in the ground nearby which Jet deduces to belong to "the light", realising that a ship has visited and kidnapped the freighter crew.