*Story Summary: _The CEO'S wife is fierce and kind. After a humiliating betrayal at school, *Yoo Ha-eun* climbs to the rooftop, ready to end her life. But when she falls, something ancient awakens—an *exiled priestess spirit* enters her body, binding her soul to forbidden power. Confused and afraid, Ha-eun’s life takes another sharp turn when she meets *Seo Joon-won*, a ruthless mafia boss known as *The Devil of Korea*, cursed to a wheelchair and feared by all. Sensing the spirit inside her, Joon-won offers her protection—not out of kindness, but mutual interest. In exchange, Ha-eun must become his *official mistress*—a shield, a symbol, and a secret weapon. But she sets her own terms: no romance, no feelings, just survival. Together, they navigate a world of curses, politics, and ancient magic. As she helps him heal from a deadly curse, and he trains her to survive the underworld’s power games, they slowly realize… the real danger isn’t the spirit or the curse— *It’s the bond growing between them*.