After three centuries, the Morgan family's spiritual heritage is waning. Gone are the days when Morgans struggled against religious persecution, carved civilization out of the wilderness, and fought to defeat slavery. Now, as the Nazi menace engulfs Europe and Japanese militarism threatens teh Pacific, the four young adult children o fJohnny and Laura Morgan show small concern. Preoccupied with big bands, movies, radio, and sports, they care little about spiritual things.

When a family reunion in San Diego is disrupted by news of Japan's attack on Pearl Harbor, Johnny and Laura's efforts to rekindle their children's interest in their roots are seemingly smothered. Within months, Alexandra, Walt, Nat, and Lilly are scattered abroad, placed in situation that test their faith and endanger their lives. With nowhere else to turn but God, they discover that in the blackest night His light shines brightest.