A young fox named Isla returns to her den one day to find it ablaze, surrounded by a pack of hostile foxes. She flees in search of shelter, narrowly avoiding many dangers, and makes it to the city. Once there, Isla is taken in by a handsome fox named Siffrin who decides to teach her the ways of foxcraft--a lost magical art--to help her locate her lost family and survive.

Isla arrives in the harsh Snowlands to find her brother, Pirie, and must face the powerful fox known as the Mage that is using foxcraft to summon an ancient threat that could cause destruction.