After the death of her beloved father, headstrong princess Thirrin Freer Strong-In-The-Arm becomes warrior queen of her homeland, Icemark, defending it from a formidable invader. Despite Thirrin's bravery and the support of Oskan, the Witch's son, the task proves more difficult than Thirrin ever dreamed. She must assemble a force to rival her opponent. And, in the chill winter of Icemark, she only has until spring to unite the strange beasts and frightening creatures who live just outside her country. Ultimately, it is Thirrin's vision and determination that will see her through to victory.