Fia and her snow deer Solas have always had a powerful and unbreakable connection. But as Fia's village face a seemingly eternal winter, they turn their sights to Solas and an ancient prophecy that promises the return of sunlight and life, if the ultimate sacrifice is made . . . 

Refusing to allow the worst to happen, Fia and her cousin Mish run from the village with Solas, seeking out the Deer Mother - the mythical being who wakes the sun at the winter solstice and who might bet heir only hope.