Frankie Rosenberg is the world's first slayer-witch, but she doesn't have that slay-life balance figured out just yet. She's still reeling from the deadly explosion at the anual slayer retreat—and new evidence that some slayers may have survived. And while she's defeated her first Big Bad, Frankie soon realizes it was just a warm-up act. Bigger, badder forces of evil are just getting started.

The Hellmouth has been reawakened and is calling old friends home. Portals are opening between Sunnydale and other dimensions. And the Scooby Gang has too many demons to contend with—real, metaphorical, and sometimes absurdly hot.

Then an oracle warns of a new foe on its way: the Darkness. Could this be what attacked the slayers? And is it coming for Frankie?