A girl in a tower. An underground kingdom. A crystal heart split in two, symbolising true love lost . . . When Kasper joins the elite guard watching over a dangerous prisoner in a tower, he believes he is protecting his country from a powerful witch. Until one day he discovers the prisoner is a beautiful princess - Izolda of Night - who is condemned by a prophecy to die on her eighteenth birthday. Kasper decides to help her escape. But their hiding place won't remain secret forever. Will they find their happily ever after?