Henry and Bess Hawe left their rural Virginia home to hunt goblins in Washington D.C.—but their latest assignment is far more dangerous than they expected. Tasked with tracking a mysterious elf accused of treason, the sibling duo uncovers an underground resistance fighting to protect humanity from a goblin plague that drains people’s magic and transforms them into mindless monsters. When Bess is bitten by a goblin and infected with the very curse they've been battling, Henry must confront dark secrets from his family’s past and unlock the true power of his volatile magic. With Bess’s life hanging in the balance, Henry must race against time to save her, stop the goblin plague, and uncover the truth behind the dark forces threatening everything they hold dear.