Luna is the princess of the dark kingdom. She couldn't make any friends or leave the castle by herself because of her parents' over protective nature. One day, on her 18th birthday(She's still immortal but in this story, she's 18), her parents decided to choose a prince for her to marry. She was sad and angry that she was being forced to marry someone she just met, but what happens when she meets a thief, one that is mysterious and handsome?