They called him feral. They should have called him free.

Renna Williams was trained to obey. As a "Domestic" shifter collared and leased by the Syndicate, her life is measured in doses of tranquilizer and the steady click of a cooling cage. Her newest assignment is her ticket to freedom: track and tag DF-19-Dax Nichols, a Feral shifter the corporations written off as a lost asset.

But the Ferals aren't the mindless monsters the world fears.

Deep beneath the rusted cranes and dead rails of a decaying city, Dax stands guard over a secret buried in iron and bone-a memory cache older than civilization, humming with an ancient wolvesong that only the "broken" can hear. Dax hasn't forgotten his name; he gave it up to keep a promise to a Matriarch who died 40,000 years ago.

When a Syndicate snatch goes sideways and Helix BioSystems closes in to harvest Dax's brain, Renna makes a choice that brands her a traitor: she lowers her weapon and takes the Feral's hand.

Forced together through forested ghost towns and silent factories, the Domestic and the Feral must become each other's only anchor against a rising Pack-mind that threatens to erase them both. As the permafrost screams and an ancient enemy awakens, Renna and Dax must decide if they are willing to burn the world down to stay together-or if the price of freedom is their very humanity.

He was forgotten. She was sent to break him. Love will make them both dangerous.