The Underworld has fallen.

An attack shatters Hades’s kingdom, unleashing billions of souls onto the earth and leaving the gods reeling. The Titans strain against Tartarus. Medusa walks free. And a malevolent force long banished begins to gather power.

In the chaos, Therese is crushed beneath the ruins of the Underworld—and her soul slips away.

Now Thanatos must fight on two fronts: restoring balance to the realms of the living and the dead while racing to find the woman he cannot lose again.

As ghosts overrun the mortal world and divine alliances fracture, Melinoe the Malevolent rises from exile with her own twisted agenda.

And if she succeeds, the barrier between life and death may collapse forever.

Love made Therese a goddess.

War may make her something else entirely.

In this thrilling fourth installment of The Underworld Saga, gods fall, kingdoms crumble, and even Death must confront the possibility of losing everything.