Haunting at Gravity Falls

As Dipper and Mabel come back to the falls on their 18 birthday, they decide to get a new summer job to help there uncle with the Mystery Shack. Little did they know that there new work would be at the famous children and adult killing Freddy's Pizzeria. No idea of whats going to happen, the two take the job but four other people are on their sides trying to keep them alive.