Twelve-year-old Bertie Blount is great at causing trouble. When she's forced to leave behind her dad and friends in North Carolina so her mom can marry the most boring optometrist in the world, Bertie has a chance at a fresh start. But when Bertie arrives in Pennsylvania, she doesn't just bring trouble; she brings disaster. In a moment of anger, Bertie unwittingly triggers an accident that puts her future stepbrother in a coma. Broken and desperate to make things right, Bertie prays for a miracle. Instead, the universe gives her a pair of supernatural sunglasses, a wise-cracking doppelganger, and a terrifying ghost that sends Bertie on a dangerous mission to find the one thing that just might save her stepbrother's life.