For years they've been nomads for justice, but a final mission may just lead their hearts home. Members of the legendary Hanger's Horsemen, Mark Wallace and Jonah Brooks arrive in Llano County, Texas, to deliver a steed, never expecting they'd help deliver a baby as well. Left with an infant to care for, they head to a nearby foundling home, where Mark encounters the woman he nearly married a decade ago. After failing at love, Katherine Palmer has dedicated her life to caring for children, teaming up with Eliza Southerland to start Harmony House. Eliza understands the pain of not fitting society's mold, being illegitimate and of mixed ancestry. Yet those are the very attributes that lead her to minister to outcast children. The taciturn Jonah intrigues her by defying all her stereotypes of men, but there are secrets behind his eyes—ghosts from wars past and others still being waged. When the Horsemen hear rumors of missing children, they stay to investigate, sticking close to Harmony House and its beautiful owners. As they work together to uncover the truth, love and danger grow hand in hand until a final sinister scheme threatens to destroy them all.