Based on the Spongebob Squarepants episode of the same name.

Just as their about the head home Pinkie and Trixie must now work 24 hours a day (much to Trixie's annoyance) To past the time Trixie tells Pinkie the story of the Hash Slinging Slasher, which couldnt possibly be real.

So what happens when the signs of the slashers arrivial start to happen?