Grace was abandoned by her mother since childhood and raised by her grandmother. No one knew that this seemingly useless omega was the genius therapist of the Amber Pack. When her long-lost biological mother appeared before her, before she could even feel surprised, she was forced to replace her mother's stepdaughter and mate with the paralyzed Alpha King Lucian, who had been disabled for years. On their wedding night, she removed the fragile omega disguise and told the wounded and disabled Lucien, "I can heal your legs." But she didn't expect that the king also had his own secrets. If he was truly paralyzed, then who was the man who, drunk, carried her into the bathroom? When Lucian's hidden identity was exposed, and Grace's healing powers grew stronger, her mother and sister regretted it. They accused the marriage of being illegal and demanded a return to their original identities. "I only want my replacement bride," Lucian said, his eyes filled with murderous intent. Before becoming true partners, they not only have to face the enemy together, but also confront the secrets of the past.