Cassidy Mariano was a 28-year-old kind and soft-hearted lady with a successful career.Everything in her life was perfect.Her future was secured and she has no problem with everything or anything.But because of her money-greed stepsister,her life has meet its end. With a thought that everything is over,she opened her eyes expecting to see herself in heaven('cause she believe that she's been a good servant of God when she's still alive)but what meets her eyes was not she was expecting.It was two beautiful set of emerald staring at her with fear in their gaze.With all the confusion,she then soon learned that she's inside the novel called 'Princess Yvollonia'.A novel romance story of a lovely princess with a pure,kind heart, where in one of the twins got fallen in love with.But at the end the twins only got exiled by the emperor because of their wrong doings including their family. And now she got transmigrated when they were still 5-year-old.She'll do everything she can to save them and her life...even her devil of a husband,Duke Augustus Valiriani De Covellia.