The Ship held ten thousand plus, the voyage was one way and the duration, human life span plus. Just the circumstances in which, however, hand-picked human can become bored, fretful, suicidal, homicidal, rebellious or deranged. And hand-picked there were, for this was not some routine near-space commute.  With Earth and the asteroid colonies self-destructing behind them, Newhome was carrying humanity;s seed corn and Marianne O’Hara was tending the last hope of survival for the species.