Big Top Scooby-Doo!

Scooby-Doo and the gang arrive in Atlantic City, where a werewolf breaches a jewelry shop, triggering an alarm and stealing a ruby necklace. The creature bolts into the hills overlooking the Brancusi Circus, leaving the town rattled and the circus on edge. Locals whisper that the stalker has been haunting the troupe for months.

Fred's curiosity leads the group to mingle with Brancusi Circus performers, while Velma recalls an Ingolstadt legend about a werewolf named Hans who hoards jewels to fuel his transformations. The clues begin to weave together, suggesting the werewolf threat could be linked to the circus itself. The notion of a cursed predator grows stronger as more threads emerge.

To get to the bottom without tipping off the culprit, they go undercover as circus performers. Whitney Doubleday becomes the animal trainer for Scooby and Shaggy, Velma takes the Human Cannonball act, and Archambault takes the strongman role. Fred tries trapeze duties with Oliverio, Lena provides flirtatious distraction, and Daphne fills in as a clown.

During a break in the show, the werewolf targets Schmatko and abducts him, plunging the troupe into a renewed panic. The rest of the performers scramble to keep the show running while the mystery deepens behind the scenes. The audience remains unaware of the danger, thinking it is part of the act.

The werewolves strike once more, wearing the outfits of missing artists and challenging the gang to stop them. The performances continue with a chilling air as the audience remains convinced it is all part of the spectacle. The troupe senses that the danger is closer than they admit.

Archambault, Lena, and Marius vanish, leaving the troupe unsettled and holding its breath. A private show for celebrity singer Wulfric Von Rydingsvard is scheduled, promising a pivotal moment in the night.

Velma connects a carbonado, a black diamond, to Wulfric, hinting at a possible motive rooted in jewel theft. The revelation adds a new layer to the mystery and narrows potential suspects. The gang grows more convinced that the jewels and the werewolf threat are connected.

The show builds to a dramatic reveal as the 'werewolves' turn out to be Whitney Doubleday and his trained baboons in disguise. A clever use of Doubleday's own commands helps subdue the impostors. The crowd cheers as the illusion collapses and the truth comes out.

The gang learns that Archambault had long conspired with Doubleday, using the circus as cover to plunder jewelry and money. He had even planted a misleading clue about Ingolstadt werewolves to misdirect the investigation. The revelation exposes the mastermind behind the string of thefts.

Doubleday is captured and the jewels are recovered, though a few pieces remain momentarily missing as the dust settles. The crew works to clear the troupe's name and restore order after the chaotic spree. The victory feels earned as the immediate threat ends.

With the danger resolved, the Brancusi Circus packs up to leave Atlantic City. The team heads out as the crowd awards them a final round of applause, turning fear into fascination. The troupe departs wiser and more united.

In a final gesture of thanks, Wulfric Von Rydingsvard grants the gang a private performance, sealing the night with spectacle and camaraderie. The Brancusi Circus ends the Atlantic City engagement on a high note as friendships are cemented.