When a valuable Confederate uniform disappears from a special display at the library, Kate Hanlon has another mystery on her hands in Angels Undercover.

History comes alive in Copper Mill when a group of Civil War re-enactors come to town. But when valuable historical memorabilia belonging to Caroline Johnston's grandfather, a Confederate hero, disappears from a display at the Copper Mill library, Kate vows to help the brokenhearted widow find answers. A series of break-ins around town raise fears, but not all the burglaries are as sinister as they appear. A mysterious note, a suspicious request, and a long-buried secret lead Kate on a roundabout search for the truth. Meanwhile, a debate about worship music may just tear Faith Briar Church apart. With some members ready to split, can Paul hold this fractured church together? As they struggle to keep peace in their community, Kate and Paul realize that sometimes God sends angels where you least expect them.