In this ninth book in the Angel of Mercy series, nurse Breanna Baylor Brockman is temporarily assigned to Dr. McClay Lowry at a clinic in Redstone, Colorado. Soon after she arrives, someone starts a methodical killing spree in the town, murdering even Dr. Lowry's wife. Breanna suspects who the killer is - but before she can confirm her suspicion, he kidnaps Breanna and imprisons her in a mountain cabin, where he promises to execute her in a few days. While he's gone, storms and a rising river threaten the cabin, testing Breanna's faith even more. Al Lacy delivers another dramatic story that demonstrates the power of a faith based on Things Not Seen.