Since Ava's parents disappeared without a trace, nothing in her life has been the same. If someone had told her that there were talking bears and a secret school where everyone lived in tree houses and was bullied by skunks, she almost certainly wouldn't have believed a word of it. But it is precisely this school, located in the middle of Redwood National Park in northern California, that the only clue to her parents' whereabouts leads her to. Together with her spirit animal Spirit and the inscrutable River, Ava embarks on a dangerous quest on the other side of the shadow portal. Are they strong enough for what awaits them there? An exciting fantasy adventure for ages 10 and up, for everyone who loves magical stories!