Three amazing months after Paradise returns to Equestria and after Opaline's defeat, there is a great reason to celebrate-- Queen Haven and Alphabittle's two-year dating anniversary! But as the celebrations begin, our heroes are pulled into another Unity Quest... this one revealing secrets from Mystery Incorporated's past.

When Mystery Inc bumbles a case and nabs an innocent man by mistake, the gang is forced into early retirement from crime-solving. But it doesn't take long before their old friend Vincent Van Ghoul needs help and pulls the team right back into action.

It all started one summer when Scooby, Shaggy and Daphne secretly tracked down 13 of the world's spookiest ghosts, and caught all but one. With the 13th ghost on the loose, and the Chest of Demons holding the remaining 12 ghosts nowhere to be found, the gang will have to leave their secrets in the past, reunite with Vincent Van Ghoul, make some new flying leopard friends and find the Chest of Demons before the other 12 ghosts can be released into the world.

But the real question is, will the Mane 6 be able to help their friends in their most important mission yet, while reminding them never to give up hope?

Bundle up and get ready for the icy slopes of the Himalayas with chilling car chases, crystal balls, magical friendship moments and spine-tingling spells in this terrifyingly fun adventure!

(S3E1 of G5 Adventures)