In the Shadow River Pack, Luna Elara is nothing more than a phantom in her own hall. Ever since her mate, Alpha Kade, moved his late brother’s widow and child into their home, Elara has been systematically erased. Treated as an inconvenient afterthought while Kade plays devoted father and husband to another woman, she is bound by duty to a man who has already checked out. Then comes the Solstice Summit—and Alpha King Rhydian. Ruler of the ruthless Bloodhound Pack, Rhydian is a tyrant feared across territories, known for taking whatever he desires. And the moment his dark, hungering eyes land on the neglected Luna, he desires her. Rhydian doesn't care about pack treaties, and he certainly doesn't care about Kade’s claim. He offers Elara the one thing her mate denied her: absolute, unapologetic devotion, wrapped in lethal power. When Kade finally realizes what he's losing, his belated rage tears through the territory. But the howls of a regretful mate mean nothing to a woman who has already caught the eye of a Alpha king—and learned just how sweet betrayal can taste.