The third book in a quadrilogy called Marks... Darkening continues the story of Sophia Alexis Rose, a young girl thrust into the position of Queen after a reign of complete terror. Together with her husband, Trevor, and the time-traveling assassin, Levi Steel, she works to try to undo her destiny before her ultimate demise. Beginning with the thrilling tale of Incineration, Sophia discovered her powers, made great use of them, and defeated evil with a strong hand filled with flames. Frostbite continued her story and struggles as new Queen of Volglacia, discovering a nation destroyed is thriving, the betrayal of her brother, and her selfless sacrifice to save her husband from death. She made a promise to die, but does not intend to keep it.