Between layers of deceit and magic, nothing is as it seems. Alison Wilde is an ordinary girl in a nearly normal world, until an uncharacteristic turn of events shifts reality, as she knows it, completely upside down. Plunged into the Netherworld, with little memory of her life back on Earth, she is faced with a host of horrifying fantastical creatures, some more familiar than others. But as her newfound companions attempt to guide her through their unsettling and tumultuous realm, dark forces are at work which threaten the very fabric of the Universe, and who will stop at nothing to prevent Alison from achieving the potential her destiny holds.