The Reever Wars

The war had been going on for at least five years now, but even before the Reevers were created humanity had already destroyed most of the Earth themselves. The Reevers just pushed what was left of humanity into hiding.
Set in a different kind of Earth, Malcolm has fought the Reever war since it began. He lost as much as his comrades.
Can a woman with an old soul bring him back from the deep depression he still holds?