A new America called Valhalla grows restless under the controlling long arm of the Datum government, while all of the Long Earth is infused by the song of the trolls who are starting to react to humanity's thoughtless exploitation, bringing humankind to the brink of war.

When Trollee gets stuck in a tree, Mike uses his knightly skills to help rescue him.

In order to escape from giant trolls, Ella and Owen must grant their wish for puppies, but all the puppies in the land have been taken by an evil Cyclops.

Thirteen-year-old Twig, having always looked and felt different from his woodtroll family, learns that he is adopted and travels out of his Deepwoods home to find the place where he belongs.