Anastasia, a spells professor at the Tower Grove House of Night notices that all of her students seem to be enamored with Dragon Lankford. Though she has never met him, she decides to create a spell ensuring that her students are not overtaken with young love. Little does she know however, that this will lead to Dragon actually showing up right before she finishes the spell. Meanwhile, Tower Grove is being threatened by far greater dangers. Can Dragon and Anastasia protect the House of Night, or will their entire world be exposed?

Dragon's Oath is the beginning of the doomed fates of the star-crossed lovers Anastasia and Dragon. Dragon grew up in nineteenth century England as a rebellious, troublesome teen. When his father is fed up with his son's embarrassing actions, he banishes Dragon to America. Upon Dragon's departure, he is marked by a vampyre, a mystical being, to study at the Tower Grove House of Night, a school to learn the magical ways of the vampyre. At the House of Night, Dragon becomes a skilled swordsman and warrior. He also meets Anastasia, Professor of Spells and Rituals.