As Kate Winters is about to be crowned Queen of the Underworld, Henry, ruler of the Underworld, is abducted by the only being powerful enough to kill him: the King of the Titans.
When Henry--a mysterious boy who claims to be Hades, god of the underworld--makes a deal with Kate to help save her mother's life, Kate must pass seven tests and become Henry's immortal lover, or die trying.
Escaping a life of marginalization and misery, Kitty Doe joins the most powerful family in the country, a choice that requires her to assume the identity of the Prime Minister's niece and stop a rebellion that ended her predecessor's life.