It is the Year of Our Lord 2754…
You will never feel the sun’s warmth under a blue sky, never hear the wind in the branches of a tree, and never swim in the ocean, all because you had the misfortune to be born on the Ship, chained to a fate you didn’t choose. You have never seen Earth and you’ll never see Proxima Centauri either. You’re doomed to live and die on the Ship in the name of the Mission, like your father before you, like his father before him.
The Ship is old. She had already been twenty years in service when she was rechristened Starfarer - a pretty name for a retrofitted interplanetary freighter. No one is certain the Ship will actually reach its destination, and nobody much cares, since no one alive now will live to see it. Might as well get on with your life and try to make the best of it.