Space agencies and private companies are already drawing up plans for permanent human settlements beyond Earth, and this film asks where the first one will actually go up. Theoretical physicists, geopolitical forecasters, and other researchers weigh the candidates: the Moon, close enough for supply runs and already targeted by NASA's Artemis program, against Mars, farther away but richer in resources like water ice and a thin atmosphere that could someday be engineered. Interviews cover the engineering problems nobody has solved yet, from radiation shielding to growing food in low gravity, and the political questions of who gets to claim territory once a colony is viable. The film also looks at how choices made now, in propulsion research, orbital law, and international cooperation, will shape which option wins out. It moves at a brisk pace through interviews and illustrative footage rather than dwelling on any single mission, treating space colonization as a near-term engineering and policy problem rather than science fiction.