he Discovery crew travel west across the Mare Australis in pursuit of the mysterious ship. Meanwhile, Frank and Grimshaw, crew members of Freighter 1, reach the wrecked Freighter 2 and take up residence for the night. However, during the night, a 'sphere' arrives and its crew attempt to enter the wreck. Whilst observing the crew, Frank realises they are human. A few days later, Discovery's crew reach a valley in the Argyre Desert, and a city which is identical to the one in Jet's earlier dream.