After the Dipper Pines' and Bill Cipher's wedding, Dipper and Bill have been blessed with a beautiful demon human daughter named Diana Belle Pines-Cipher. She is the light of Bill and Dipper's life. But as the daughter of the greatest mystery hunter and the most powerful demon, Diana Belle wants to prove that she can be just as great as her parents! But will she be able to unlock mysteries that even Dipper, Mabel, or Bill couldn't figure out?

The soon to be king Bill Cipher is finally going out of the palace for the first time since he was five. While visiting he bumps into a peasant that goes by the name Dipper Pines