Early fall is now in Equestria, and the Lumi-Bloom is quickly approaching, meaning it's time for the second annual Bridlewoodstock Music Festival! Ruby Jubilee and the Dreamlands (Minty, Blue Belle and Snuzzle), four musical performers who grew close over last year’s festivities, want to do more than perform music-- they want to help the Mane 6 in their mission to protect Equestria… but they are unsure how. Luckily, they get their chance when the Unity Crystals call them to help the Mane 6 on their latest adventure.

Scooby-Doo, Shaggy and the rest of Mystery Incorporated are geared up for a relaxing vacation by the time the ponies arrive… just make it any place without ghosts or monsters! But, like, how very Velma to steer the Mystery Machine right to Vampire-Palooza, a vampire-themed festival in a small town in Louisiana. It’s not much of a scene until a vampire theater troupe, led by pasty heartthrob Bram, meddles with an ancient vampire resurrection chant, bringing the dreaded vampire Lord Valdronya back to life!

Now the festival is hopping, the stakes are flying, and our heroes are in the utmost danger-- Shaggy is sure that he’s been bitten (Ponies and Scooby-Doo, save yourselves!) and Lord Valdronya wants Daphne for his bride!

Can our pony champions and their Mystery Incorporated friends find a way to save the day? Will Ruby Jubilee and the Dreamlands prove that they have what it takes to not only be singers, but heroes as well?

In this brand-new musical adventure, the creatures of the night aren’t the only things vamping it up. Mystery Incorporated, the Mane 6, Ruby Jubilee and the Dreamlands are ready to sing and dance their way out of this one!

(S3E18 of G5 Adventures)