Planet XELIA—what most records call Lost World—has been abandoned by whatever civilization once lived there. Nature has reclaimed it entirely, and its ecosystems have grown without interference for generations. Then the satellite tracking system picks up movement: ships matching Hunter profiles are operating near XELIA, and the evidence points to wildlife trafficking—creatures captured and sold for use in circuses or as forced labor. Samus Aran is deployed by the galactic federation to investigate and shut down the operation.