The group revert to a ballistic non-linear structured montage to showcase the deleted scenes from their second film in a special that celebrates the chaotic Halloween spirit that annually enchants University campuses every October.

Mystery Inc. has cracked the case to top all cases! They’ve tracked down Coco Diablo, the head of a notorious costume crime syndicate. With Coco and her kitty in prison, Mystery Inc. thinks that they can finally enjoy a break. Wrong! Suddenly, menacing doppelgänger ghosts of the Scooby crew and favorite classic foes show up in Coolsville to threaten Halloween. Now it’s up to the meddling kids to unmask the latest scoundrel and save Halloween!

The crafty Bad Guys crew embarks on a high-stakes Halloween heist to swipe a priceless amulet from a spooky mansion. What could go wrong?

When Melvin tries to cancel Halloween, clever best friends Harold and George create their own spooky holiday -- and it's a huge success!