Haunted by the horrors of war, ex-cavalry officer Matthew Hanger leads a band of mercenaries known as Hanger's Horsemen who have become legends in 1890s Texas. They defend the innocent and obtain justice for the oppressed. But when a rustler's bullet leaves one of them at death's door, they're the ones in need of saving.

Dr. Josephine Burkett is used to men taking one look at her skirts and discounting her medical skills. What she's not used to is having a man change his mind in a heartbeat and offer to assist her in surgery. Matthew Hanger's dedication to his friend during recovery earns Josephine's respect, and when she hears of her brother's abduction, he becomes her only hope for rescue.

Matt has stared down ruthless outlaws, betrayal, and injury, but when a bossy lady doctor crawls under his skin, his heart is tempted to surrender. And when she is caught in the crossfire, he may have to sacrifice everything—even his team—to save her.