Hawkins is quiet again-but Maggie Harrington knows better. Haunted by the Upside Down and stuck in her brother's shadow, Maggie struggles to keep her world together. When Max arrives, everything changes. And when Billy Hargrove follows, danger comes with blue eyes and a reckless smile. In a town full of secrets, Maggie must learn what scares her more: the monsters she's faced-or the ones who feel familiar.