For as long as anyone can remember, Finn's family has kept Darkmouth (mostly) safe from the dangerous mythical creatures known as Legends. Finn has trained all his life to become a Legend Hunter. Soon it will be up to him to protect his hometown. So it's too bad Finn is terrible at hunting Legends. Send him to capture a Minotaur and he'll trip over his own fighting suit. Give him a Basilisk to trap and he'll accidentally capture a car. If Finn doesn't finish three hunts before the Completion ceremony on his thirteenth birthday, he'll be the first member of his family to fail. Ever. But that's about to be the least of his problems, because the Legends are plotting something big. Something involving strange crystals, a possible traitor, and a mysterious prophecy. A prophecy about Finn. Finn might just be the worst Legend Hunter in history -- and now he's Darkmouth's only hope.