It is the year 2791, Jemima is on the 'Andromeda, ' deep in outer space. The 'Andromeda' is a ship in the Galaxy Patrol. Jemima's parents are its commanders. Wherever they go, Jemima goes too. So does Grandma—until the 'Andromeda' is ordered to investigate a mystery: part of the universe appears simply to have vanished...