For years, Gansey has been on a quest to find a lost king. One by one, he's drawn others into his mission: Ronan, who steals from dreams; Adam, whose life is no longer his own; Noah, whose life is no longer a life; and Blue, who loves Gansey … and is certain she is destined to kill him.

Nothing dead can be trusted.

Now the endgame has begun.

Nothing living is safe.

Dreams and nightmares are converging. Love and loss are inseparable. And the quest refuses to be pinned to a path.