Eighteen-year-old Eden discovers her mother has lied to her for as long as she's been alive: her father is not dead. He's alive, and somewhere in London. The main problem? Not only is her father not dead, he's also not human.

The city of Under-London, the mound of the Unseelie Fey, has a history and heritage as rich as its ancient people: kings and queens, humans and fey, who have shaped the mound and its people from its humble beginnings to its most recent turmoils. There are Midir and Edaine, a lonely fey king and his lost wife; Cadeyrn, the desperate and furious sidhe soldier; Caroline and Wyn, a pair of star-crossed lovers; Martin and Sig, a duo who risk their hearts and lives for the safety of others. Through it all a single being, Hunt-Leader--an ancient being who controls a wild and ravenous host of spirits called the Sluagh--works in the goddess's name to bring peace and justice to humans and the Twelve Fine Families of the Fey alike.