For centuries, the four Urekai Beast Rulers searched for the one woman capable of carrying their bloodline. Countless attempts across generations ended in failure—not because of a lack of power, but because no human body could survive the ancient Urekai lineage. Their race teetered on the edge of extinction, and hope became little more than legend. Then, one ordinary young woman appeared, unknowingly possessing a rare, forgotten trait that allowed her to succeed where no one else ever had. Overnight, she became the most sought-after person in the Urekai realm, with four powerful rulers determined to protect—and claim—the future of their species. Each ruler believes the mysterious young woman is the key to saving the Urekai race, but as rivalries ignite and alliances crumble, what begins as a desperate fight for survival soon becomes a battle for her trust, loyalty, and heart.