SS Moraturi is a Lunar Earth Transfer Orbiter—a kind of spider robot designed to construct space stations and ships in and around the Earth-Moon Lagrange points 1 and 2. Now Moraturi is taking two cryoholds full of colonists to New Eden, an earth-like planet in the Paradisi system, 2.5 million light years from Earth in the Andromeda galaxy.
Eva's problem is that the trip that was to take one year is now going to take decades—their emergency supplies were based on 200% of expected needs for just 16 crew members with the 500 passengers in cryo, and the cryotechnology can't keep them alive for even a decade at a stretch.
Just to make things interesting, two teenage boys have come up with an idea that might just make it possible . . .