When Danny finds out that they are going on a family vacation to Gravity Falls, he expected to finally have some time off from ghost hunting, he guessed wrong. As soon as he entered he knew something was off with this small little town. After meeting the mystery twins - Dipper and Mabel pines - Danny finds himself in a summer babysitting job that takes a turn for the worst when he finds an old "friend" also visiting the town. Trying to have a fun summer with the twin while also trying to hide the biggest secret from them.