It was summer already in june, finally mabel and dipper going back to gravity falls, it was a year since they where in gravity falls and defeated bill, it was a nice day outside, mountains everywhere and rumors around the mountains, untill a crash... Mabel and Dipper where in a unknown cave with a huge hole... Rumors says that is where the monsters live....In the underground.. Will they survive? Will one of them die? Will they escape? Find more by reading...All Rights Reserved