For years, engineer Landen Keene has envied the Kronian colony among the
moons of Saturn, which embodies the pioneer spirit that Earth has lost.
Then a Kronian delegation arrives on Earth with newfound evidence that
the planets underwent cataclysmic changes only a few thousand years ago.
And a white-hot protoplanet which Jupiter has emitted is found to be on
a collision course with Earth. Keene has to choose between escaping on
the Kronian ship or making a desperate cross-continent journey to find a
woman he didn't even realize he cared about--if she is still alive....