Isla and her brother are two young foxes living just outside a human city, but one night Isla returns to her den to find it destroyed, and surrounded by strange, vicious foxes, so she takes refuge in the city while she masters Foxcraft--the ancient magical arts of her kind.

Cozy and her littermates are driven from their suburban den because something is killing the foxes in their area, and so they travel to a strange new world, the City, to confront a new set of dangers, where they meet 0-370, an injured fox who has escaped from a fur farm and who gives them a new mission--return to the farm, defeat the humans, and free the caged foxes.

When Sylvie runs to the river she and her sister Jules are not supposed to go anywhere near to throw a wish rock just before the school bus comes on a snowy morning, she runs so fast that no one sees what happens ... and no one ever sees her again. Jules is devastated, but she refuses to believe what all the others believe, that--like their mother--her sister is gone forever. At the very same time, in the shadow world, a shadow fox is born--half of...