In an arctic world that's getting colder every day, Lyriana's only hope of survival is to get her little brother Zave and herself to the fabled Orphan's Garden. It's rumored to be the one place in the world not controlled by deadly Winter Spirits or ruled by the tyrant Giant king. In Orphan's Garden, healing trees will melt away Winter's pains, and Lyriana and Zave can live safely in the warmth of Spring. If the garden exists, they must find it. They won't live much longer without it.

Brob, a Giant boy, also needs sanctuary. When the Giant king banishes his family to the Winter Blight, it's a death sentence. Orphan's Garden is his family's only hope, and as far as Brob's concerned, it belongs to him. After all, he was the one who accidentally used an ancient magic to grow the garden years ago. He has no intention of sharing his haven with pesky humans, who will just use up its magic and ruin it.

When it becomes clear that Orphan's Garden is in danger of being destroyed, Lyriana and Brob are the only ones who can save it - but only if they can put the ages-old battle between Humans and Giants aside and find a way to work together.