- In order to save her father, the down-and-out daughter Su Wan signed a three-year hidden marriage contract with the chaebol leader Lu Yanzhou. She is a talented architectural designer and a top hacker "Shadow"; he is a ruthless business emperor and a mysterious man who was rescued by her many years ago. From contract to true love, from the business world to the dark world, the two of them join forces to uncover the mystery of their life experiences and sweep away all enemies.
