The Legacy was closing in on its destination, but there wasn't any trace of the lost city of Atlantis in sight as a result of the cloud of fog engulfing the ship. There was an announcement, alerting the monsters and humans to come out of their staterooms.

When Dracula emerged on the deck while fixing his collar, he smiled awkwardly at Elisa, who was carrying Adrian and had come out with Melany and Lydia. But the Count was responded by cold frowns as his family ignored him and trailed after Lydia. A melancholy Dracula's shoulders slumped lower than ever, but it passed when his curiosity was aroused by what the announcement is about.

"Everyone, please assemble on the forward deck. We are arriving to our final destination: from the depths of creation, the might city has risen once again. Home to the greatest monster civilization the world has ever known, surpassing Athens and Rome in art, culture, and sophistication. I give you the legendary lost city of Atlantis."

As the ship approached closer to its marking point, giant tentacles surrounded the boat and startled everyone.

"Ohhh! It's a giant kraken!" Kelsey screamed in horror, wrapping her tentacles around Brett, hoping he would protect her.

It was the Kraken, a legendary sea monster... and a lounge singer. And he began to sing:

There's a place, you gotta be
A thousand leagues beneath, the sea
And it's waiting over here, for you and me

When everyone realized the kraken wasn't going to attack them, their fears were put to rest and grew fascinated by his singing. With a sweep of his tentacles, the kraken carried the Legacy right over to Atlantis, a Las Vegas for monsters, but humans are welcomed to come as well.

Gonna take you for a ride, but first you gotta come inside
Get ready for, the party's on tonight!

When the ship docked, the passengers' path to the Atlantis casino was lit with spotlights and lined with giant golden statues. Laser light shows turned waterfalls rainbow colors and everything else sparkled like gemstones. The monsters and humans approached a casino that looked like a giant aquarium, full of whales swimming through the walls, ceiling, and floor. There was even a roller coaster for both kids and adults to enjoy.

So, relax and just unwind
Leave your worries, all behind
And get ready for, the party on tonight!

In the center was a giant statue of King Triton. The animatronic ruler greeted the monsters and humans as they came in, saying, "Welcome to Atlantis!" The monsters and humans quickly settled in and started gambling.

Kelsey and Pedro went to a row of slot machines. Pedro tried chanting an Egyptian language so he could win a lottery, but it failed to his dismay. Feeling sorry for him, Kelsey used all her tentacles to pull five levers at once... and hit the jackpot on her first try. Pedro gave on of Kelsey's tentacles a high five.

So get ready, it's party time!

Frank and Ben took in the sight around them, eagerly ecstatic at gambling in such a beautiful casino. However, Frank was scared half to death by the fire in Eunice's scowling yellow eyes.

"Oh no, you don't!" Eunice scolded him. "Last time you played cards, you lost an arm and a leg - literally!"

But Frank wasn't listening. Without using his neck, his eyeballs crawled to the back of his head to watch a poker game.

"Replacement limbs aren't just lying around like they were in the old days, so no gambling!" Eunice noticed he wasn't paying attention. "FRANK!" she demanded.

Frank's eyes zipped back to the front of his head, saying quickly, "Yes, dear! Got it! No gambling!"

"And that goes for you too, Hankie!" Eunice had caught Hank about to pull a lever at a slot machine.

"Rats!" Hank grumbled.

"Tough luck, big guy." Mathias shrugged, grinning smugly at Frank. "But don't worry, I'll do the gambling for you." But the second he turned around, he was face-to-face with an angry Monica, startling him.

"Don't even think about it, young man!" Monica warned him. "I won't have you gambling away all our vacation money!" She noticed a fancy buffet close by. "Why don't we get a bite to eat while we're here?" She grabbed her son by the ear and hauled over to the buffet, whimpering all the way as Frank chuckled at his predicament.

On the casino floor, Vlad was surrounded by witches as he played poker. Dennis's cousins, Melany's cousins, Polly's kids rode the roller coaster, while the younger kids, baby Adrian, Evan and Wendy hung out in a playpen area for little kids, much to Wendy's dismay cause she felt too old for this despite her small cute appearance. Some of the humans gambled like Johnny's brothers, despite warned off by Mike. The other humans just ate dinner at the buffet like Johnny's parents or Elisa's family.

Tinkles was chasing a half-cat and half-fish creature swimming under the glass beneath his paws. When Elisa walked by, Dennis and Winnie did their best to block her view of the huge dog. Elisa wore her new dress to look her best; a blue turtleneck long-sleeved dress, blue low heel shoes, along with her ruby pendant around her neck, but she also wore a blue shawl that matched her dress.

"Have you seen Wayne or Wanda?" Elisa asked her vampire sister-in-law. "I know Ericka said they weren't feeling well, but when I called them or checked their cabins, neither of them were there." Her expression darkened. "I suspect Ericka knows something this."

"Agreed, but right now, I have to make sure my father doesn't gamble away all his money," Lydia said, not even bothered to share her human sister-in-law's concerns, gliding across the room to find Vlad.

Meanwhile, Dracula had been pondering over being a good father and husband to his family, and he had come to a big decision for his future with Elisa. He was going to bite her and transform her into a vampire. There would be consequences when he'll tell them about the Ericka situation, but he would have to accept them. He was so focused on his goal that he almost didn't notice Murray, Griffin and Frank gambling.

"Have you seen Mavis, Melany or Elisa?" Dracula asked his friends. "I have to find them."

"Why, buddy?" Griffin wondered. "What's going on?"

"I'm going to tell them about Ericka," Dracula announced decidedly. "I can't lie to my own wife and my daughters anymore. They're the most important persons in the world to me. I have to tell them the truth."

"That's the spirit, Drac!" Frank smiled proudly that his friend was doing the right thing.

"And another thing... I have decided to turn Elisa into a vampire!" Dracula announced decidedly.

"YOU WHAT?!" Murray and Griffin shouted in shock, except for Frank who resumed focused on his poker gam.

"Are your sure about this decision, Drac?" Murray asked him concerned. "What if Ellie does turn feral and tries to kill you, especially when she finds out you zinged with Ericka? Not to mention her dad isn't gonna like it. You think Andrei's been carrying a stake with him this whole time?"

"It's a risk I'm willing to take," Dracula spoke with determination. "We've done nothing but fight ever since this vacation started, so if turning Elisa into a vampire will prove to her that I only love her, then that's what I'll do!"

As he finished his words, Dracula noticed the second woman who had captured his heart; Ericka, who was wearing an explorer's jacket and hat, walking toward the back of the casino, looking around suspiciously.

The purple sparkles in his eyes put that famous goofy grin on his face as he eyed the captain, saying, "Right after I talk to Ericka." And he glided after her, making his friends worried that he was putting the Captain's needs before his own family, which sounded kind of selfish.

Outside the casino, Johnny was taking in the magnificent sights of the aquarium when Mavis came walking up to him.

"Johnny, have you seen my dad or my mom?" Mavis asked, she wanted to find her parents so they could all be together, just like she had planned.

"Maybe he's with Bob," Johnny replied, watching the fish behind the glass. "And your mom might be with Daniel."

"Why would he be with Bob?" Mavis asked, thinking her husband could be confusing at times. "And what's so great about Daniel anyway?" she scowled.

"Bob's a great guy!" Johnny explained, as if she should have known. "And Danny is one charismatic dude!"

Just as Johnny chased as Bob aka Tinkles, who had somehow gotten into the water behind the glass and chased after the fish-cat hybrid creature, he ran smack faced into a pillar.

"Mavis, where's Mom? We're supposed to have dinner and I'm starving!" Melany complained, coming over to her big sister.

"Please tell me she's not with Daniel." Mavis hoped her fears of her parents having a love affair with two suspicious characters wasn't true.

"She said she had to go talk to Daddy about something," Melany replied.

Just then, the two sisters immediately spotted their father quickly moving through the casino.

"There he is! And there's Mom!" Mavis pointed them out, but her smile fell when she realized that Dracula was following Ericka, the woman whom she did not trust.

"What is he doing with that stupid captain?" Melany scoffed, using her clairvoyance to discover he father pursuing the snake who had come between her parents.

Glancing at each other, Mavis and Melany knew what they had to do, and they rushed off after their father without another word.

Elsewhere in the casino, Elisa looked around trying to find her husband. "Alright, where's Drac? I really want to talk to him and apologize about yesterday." She felt bad about her outburst in Machu Picchu and wanted to make up for their fight, and hoping to save her marriage from falling apart.

Then she noticed Dracula out of the corner of her eye. Elisa was just about to head over to him, but then she noticed her two daughters following him to the rear of the casino. This made Elisa very suspicious at what was going on.

At the rear of the casino, Ericka met up with Daniel (all of them wearing explorer's jackets and hats). The duo nodded at each other. They glanced over their shoulders to make sure no was following them to the forbidden room behind the curtain. Then they ducked behind the curtain.

Dracula hid for second so neither of them would see him, then he followed Ericka, but he grew jealous as he wondered why she was with Daniel, of all people. He had no idea that that Mavis and Melany had seen him go behind the curtain, then they ducked in after him.

Even the sisters had no idea that a suspicious Elisa was behind them, joining the chase that would lead them to a secret darkened staircase.

Ericka and Daniel stopped at a giant carving of a stone face in the side of a long wall. The eyes were hidden handles that Ericka used to open a door leading to a passageway. She went inside first, then Daniel came afterward using a flashlight to illuminate their way through the darkness.

Not long after, Dracula copied what Ericka had done to the handles by turning them, which granted him access to pass through the open door. When he did, he lost his footing and fell. Daniel and Ericka thought they had heard something or someone, pausing to look back. Dracula froze in midair and hid behind a pillar. Shrugging, the group continued on their way, unaware of being followed.

In bat forms, Mavis and Melany approached the stone face carving. They put their ears to it, trying to figure how to open it. They crawled through two openings in the nose and the mouth, their wings resembled a moustache or a beard as they squeezed their way in.

Elisa arrived soon afterward. Examining the stone face carefully, she noticed the handles in the eyes and turned them, making the stone face open to allow her access. She walked inside and the door closed behind her, then she almost lost her balance and cried out when she fell, but she slid down the pillar like a slide until her bottom touched the ground.

The sound of Elisa's cries far behind them in the distance alerted Daniel, thanks to his enhanced hearing senses. "We're not alone," she said, his eyes narrowed.

"What?" Ericka glanced over her shoulder, fearing they had been discovered.

"You go ahead. We'll keep whoever is following us busy!" Daniel instructed, nodding at his four brothers as they raced off in a different direction, their weapons beneath their jackets kept in check.

Nodding, Ericka continued on with her quest. Then she hurried down ahead a narrow crawl space. She had to scale the rocks by hand, but Dracula followed easily, floating gracefully over the hazardous rocks.

Mavis and Melany were startled when they encountered a huge rat, who tried to scare them by hissing viciously. Melany was terrified and hid behind her big sister. Mavis displayed a deadpanned expression of annoyance before she punched the rat and knocked him out. Melany sighed in relief.