After Evelina Hart is forced out of her ruined noble home and sent to Saint Galan Convent to save her dying mother, she quickly learns that holiness can hide cruelty. Framed for stealing sacred silver, publicly humiliated, and abandoned on a deadly forest road, Evelina refuses to confess to a crime she did not commit. When she is pushed to the edge of death, the dark red ring left by her family answers her desperate call and awakens Lucien Ravenscar, a vampire bound to the Hart bloodline by a two-hundred-year-old oath. Lucien saves her from bandits and wolves, but Evelina refuses to become anyone’s possession, even her rescuer’s. As the Blood Oath Ring reveals its true power, Evelina discovers that her exile, her mother’s suffering, and the conspiracy inside the convent may all be connected. To clear her name and reclaim the dignity stolen from her family, she must return to the convent not as a discarded girl, but as the last heir of House Hart.
