Cathy, a medical student, once saved a ruthless gang leader and fell into a trap of blinding love. Under his influence, she transformed from a delicate girl into a formidable woman of the underworld. However, his affection was a lie; he eventually discarded and murdered her in cold blood. Granted a miraculous second chance, Cathy returns to the past with a heart of stone. She vows never to lose herself to his dark charm again. Instead, she chooses to use her medical expertise for a higher calling—saving her city and serving her nation during a time of turmoil. As the man who once broke her heart finds himself drawn to this new, untouchable Cathy, he realizes too late that the heart he destroyed is now one he can never reclaim.