Kate Winters has won immortality.

But if she wants a life in the Underworld with Henry, she’ll have to fight for it.

Becoming immortal wasn’t supposed to be the easy part. Though Kate is about to be crowned Queen of the Underworld, she’s as isolated as ever. And despite her growing love for Henry, ruler of the Underworld, he’s becoming ever more distant and secretive. Then, in the midst of Kate’s coronation, Henry is abducted by the only being powerful enough to kill him: the King of the Titans.

As the other gods prepare for a war that could end them all, it is up to Kate to save Henry from the depths of Tartarus. But in order to navigate the endless caverns of the Underworld, Kate must enlist the help of the one person who is the greatest threat to her future.

Henry’s first wife, Persephone.

It's always been just Kate and her mom—and her mother is dying. Her last wish? To move back to her childhood home. So Kate's going to start at a new school with no friends, no other family and the fear her mother won't live past the fall.

Then she meets Henry. Dark. Tortured. And mesmerizing. He claims to be Hades, god of the Underworld—and if she accepts his bargain, he'll keep her mother alive while Kate tries to pass seven tests.

Kate is sure he's crazy—until she sees him bring a girl back from the dead. Now saving her mother seems crazily possible. If she succeeds, she'll become Henry's future bride, and a goddess.