It's Holloween night and Peter and Monica go Trick-or-treating, but when they come to some weird lady's house on a different street, She's pleading for their help to find five masks. So they said they'll help, But along the way everything goes up hill, and then maybe comes back down hill, but when they get all five mask, they return them back to Bella and then Dr. Screem comes and starts fighting with Bella to take the masks away and he gets them. But nothing goes back to normal, everythings still missings, but then they changed some words in Bella's book and then everything comes back to Monica and Peter ( )

It's Holloween night and Peter and Monica are trick-or-treating, that is until they get to a new neighberhood and a stange looking house is there and they go up to it, but a strange woman is pleading for their hel, but it only turns out that they get into some trouble, their parents and their housr are missing and they have to find five ugly masks. So when they find the masks they return them, but then everything's still wrong. No house, no parents, that is until they change some sentces in that old book of the creepy lady.