When the sun takes 16 years to cross the sky, the night lasts just as long. As twilight approaches, entire kingdoms must scramble to stay ahead of the lasting darkness and the creatures that live there. It's easy for things to go missing in the chaos—and it's Chief Tracker Vickory Carroway's job to find them.But not all things are created equal. The king's daughter Dalia has run away. It's believed she's traveled to the Lightless—and if Vickory can't bring her home, he'll be executed. In desperation, he enlists the help of Tom Raquepaw. Outlaw. Sorcerer. And the only man known to have traveled to the Lightless and made it back alive.They won't have long to track Dalia down. Spend more than a couple weeks in the darkness, and you can never touch sunlight again. If they can't find her in the next few days, Dalia will be lost to the Lightless forever.