With her stammering tongue and quiet ways, Cadence Piper has always struggled to be accepted. After the death of her mother, Cadence sets her heart on becoming a nurse, both to erase the stain her brother has left on the family's honor and to find long-sought approval in the eyes of her father. When Dorothea Dix turns her away due to her young age and pretty face, Cadence finds another way to serve . . . singing to the soldiers in Judiciary Square Hospital. Only one stubborn doctor stands in her way.

Joshua Ivy is an intense man with a compassionate heart for the hurting and downtrodden. The one thing he can't have is an idealistic woman destroying the plans he's so carefully laid. When the chaos of war thrusts Cadence into the middle of his clandestine activities, he must decide if the lives at stake, and his own heart, are worth the risk of letting Cadence inside.

Everything changes when Joshua and Cadence unearth the workings of a secret society so vile, the course of their lives, and the war, could be altered forever. If they fight an enemy they cannot see, will the One who sees all show them the way in the darkest night?