The next day, Mystery Incorporated headed to see Malcolm Merlyn. While they were waiting in his lobby, Velma heard someone humming a familiar tune. It might have been something she heard at the nightclub, but she couldn't place it.

Soon, Malcolm ushered them into his office. "Like, you don't look like a wizard," Shaggy blurted out.

Malcolm laughed. "Not like the pointed hat and magic wand thing, but I am a wizard in business. Now what can I do for you?"

"We've been working with Oliver Queen and his nightclub," Fred began.

Malcolm smiled — but it wasn't a very nice smile. "Ah, yes, that decaying tooth in the gleaming smile of Starling City. What about it?"

"It's being haunted," Velma replied.

Malcolm started to laugh, then stopped suddenly. "It's true I do enjoy Mr. Queen's misfortune. But I hope you don't think I have anything to do with it. My pet project is the Glades…it's a run-down part of the city that we're hoping to renovate. I don't have time to play dress-up and scare people away from a nightclub for some petty rivalry."

Once they finished at Merlyn Global Group, Mystery Incorporated met back at the Arrowcave. "So what did you find out?" the Arrow asked.

"I think I know what's been going on here," Velma said. "But we're going to need everyone's help to trap that ghost." Scooby and Shaggy gulped and tried to hide. It took Diggle's ham-sized hands to drag them out.

The gang worked well into the night, setting up a trap for the singing ghost. When the clock struck midnight, the creepy music played and the ghost appeared.

"NOW!" Velma called as the ghost started to sing. The Arrow aimed and fired at a sack of flour hanging high above the dance floor.

It burst open, showering the dance floor with white powder. "There!" Fred pointed. The flour illuminated the beams from the hologram projecting the ghost.

The Arrow jumped down to the floor — and slipped on the flour! He slid into the DJ booth with a crash and emerged with a groan. The DJ tumbled out with him.

"Like, the ghost is gone!" Shaggy cried.

"That's because it was a hologram," Velma said.