Three days before her wedding to the Sun God, Selene Thaloriel—the hidden daughter of the Moon Goddess and the Thunder God—discovers a devastating truth: her fiancé has never loved her. His heart belongs to her stepsister, Seraphine, the mortal-born daughter of her father’s mistress.Shattered but silent, Selene refuses to beg for a love that was never hers.But fate offers her a dangerous escape.On the same day as her own wedding, Seraphine is set to marry Malakar Noctryx, the feared and bloodthirsty ruler of the underworld, in an arranged union whispered to be a death sentence. Desperate to reclaim control over her life—and to disappear from a world that has betrayed her—Selene makes a reckless decision.She takes her stepsister’s place.Bound to a demon lord cloaked in darkness and myth, Selene descends into the underworld, expecting cruelty… only to find a truth far more dangerous than hatred. As secrets unravel and power awakens within her, Selene must face not only the monster she married—but the gods who abandoned her.When the sun betrays the moon, an eclipse is born.And in the darkness, a new queen will rise.