As the Civil War rages on, Charlotte and her friends continue freeing slaves from captivity. After Charlotte faces a tragedy that shakes her faith in humanity, she is tempted by her former lover to join his crusade against them.

Charlotte has made a home with Cooper—the man that trained her and earned a place in her heart. Together, they help Mary Anne grasp hold of her dangerous powers.

Try as she might, Charlotte cannot escape John’s war or his growing superpowered army. Even more pressing, are the growing racial tensions in New York City.

Sooner or later, Charlotte knows she’ll have to make a choice, but it’s not easy defending a species that would war to keep her in chains.