She was born without the sacred crescent that brands the worthy, reduced to shadows and scraps in her own father's fortress. When the iron-willed alpha heir coldly plans to rut her beloved sister under the full moon, seed her, then discard her like spent kindling, the unmarked girl swears to shield the only soul who ever showed her mercy. But one stolen glance ignites an ancient, impossible bond that scorches through blood and bone. Now she must choose: protect the sister destined for the crown or surrender to the savage alpha whose touch awakens a feral hunger neither can escape. One night of raw, desperate claiming. One forbidden mark burned into flesh. And a dawn duel soaked in blood that will decide whether their love survives the moon's cruel judgment or bleeds out on frozen stone.