Grace Dingle is the daughter of Cain and Charity Dingle. She is eighteen and returns after getting kicked out of university. Grace soon discovers that a lot has changed in the village and that her father has remarried. Grace soon catches the eye of Adam Barton, who happens to be her step brother. Grace and Adam can't help but be attracted to each other. They know that it's wrong and that they are practically brother and sister but can't seem to stay away from each other. Adam and Grace soon start fooling around and try to keep it secret. But how long will they be able to do it for? Will Grace and Adam be able to stay hidden or will it all blow up when their family learns the truth about them?