Darkness is falling across mystic Azdia. Soon, all of life will stop glowing with light. Soon, the trees will no longer spring to life. Even the mighty feldroes will cease to roam the forests. Already, many lumens, the shape-shifting caretakers of Azdia, have lost faith in their provider and protector, the mysterious Mr. Thicket. The only hope for the creatures of Azdia are the awaited chosen ones sent from another world called Earth.
Del Ryder and her three best friends stumble through the portal into Azdia. There they meet Crimson, a lumen full of hope, who believes Del and her friends are the ones they have been waiting for. Unwilling to accept their destiny, the children still manage to enlist Crimson’s help in what becomes a fight for their own survival. Held hostage by living trees, battered by storms, and caught in a stampede of feldroes, the darkness of Azdia blocks them at every stage of their adventure. But Del and her friends persevere, following the clues of a cryptic riddle, in the hope that it leads them home.