After lugging the suitcases up three flights of stairs, the gang unpacked their things and settled into their rooms before going down the hall to meet the Hex Girls in Room 324.

The gang regaled the Hex Girls with the tales of terrifying monsters and exotic places that they had seen. The Hex Girls told the gang about the world tour they had just finished; their grand finale was to be here with the Vegas concert.

Several hours later, the gang joined the Hex Girls inside the Hard Rock's enormous concert hall. The stage was lit by red and blue neon lights, casting the Hex Girls with an eerie, otherworldly glow. A powerful fog machine hummed in the corner, generating frightful clouds of smog. The gang stood front and center of the rollicking crowd. They knew every song and sang along with Thorn's belting voice. Scooby even joined in on the fun, howling along to Trap of Love.

About halfway through the concert, the neon lights mysteriously began to get brighter. People began to cover their eyes because the neon was getting too bright for them to stand. Suddenly, the lights exploded, causing the Hex Girls to scream and duck for cover from the flying shards of glass! The room was plunged into near-darkness. A glowing red skeleton, as tall as a full-grown man, emerged from backstage. It let out a hideous, shrill laugh as it strode out onto the stage.

"Ladiessss and gentlemen of Lassss Vegassss," the creature hissed in a shrill, crackling voice, "I hope you enjoyed the light sssshow. It sshall be one of your laaaaast. By the end of the week, I sssshall plunge thissss city into ABSSSSOLUTE DARKNESSSSSS!" At these words, the monster vanished and the room was pitch black once again.

A mass panic and stampede for the door began. Miraculously, no one was trampled or injured. Outside in the lobby, the gang and the girls reconvened to discuss what just happened.

"Thorn, have you or the others heard if this happening before we got here?" said Velma.

Thorn looked bewildered. "No, this is the first we've seen that neon creep," she replied, still shaken from the attack.

"Well, it looks like we have a mystery on our hands," said Fred. "Let's get some sleep and we'll start our investigation in the morning."

Shaggy and Scooby strode off quickly. "All the more reason to sleep 'til noon," Shaggy muttered to his pet.

"Roo raid rit!" Scooby barked.