The World is six kilometers long, and one kilometer wide. You’re born, you live, you die, aboard the ship, the Ad Astra, now almost six hundred years from Earth. Some people say Landing Day is just a holiday, others say that one day, you’ll finish the trip, walk in the open air, live as long as you can. Is the journey real? Are the monsters out there or the monsters inside the ship real? If they are, can anyone actually finish the trip?