Gruncle Stan opened the portal. Now were going close it. Hi, I'm Dipper Pines. Me and my sister mabel have been uncovering the secrets of our town in Gravity Falls, Oregon. But the biggest secret yet was the Author of the journals. Now the portal will not shut down and Bill Cipher, our little triangle demon, has been causing chaos. The only way to stop him is to enter the portal and save our world. But something tells me that the one were going into will not be what we think it is. Monster Falls; based on Gravity Falls TV show.