This episode will have the plot to How to Train your Dragon 2.

In the oceans of Equestria, Zach, Ethan, Will, Warren, Their Pokemon pets, Twilight Sparkle, Pinkie Pie, Applejack, Rainbow Dash, Mickey, Goofy, Donald, and Professor Von Drake were exploring the wonders of the deep for their science projects. As they were looking at fish, Zach got board, "When are we going to see the Kraken, sea ruins and mermaids?" he asked.

"Well, the possibilities of seeing a Kraken is-." Prof. Von Drake explained as he got out a calculator, "55555555555555-."

Will accidentally pressed down a lever and sent Prof. Von Drake to the sea and made him trapped in a clam, there the clam swam off. They knew they had to save Prof. Von Drake. Ethan and Goofy decided to watch the sub.

Will, Zach, Warren, Mickey and Donald were looking around in old fashion diver outfits. Goofy looked at the beacon in the sub, thinking it was a clock. He tried to fix it, but it hurt their ears.

"We need light," Warren said.

But he accidentally pressed the torpedoes instead. It freaked Zach and Ethan out. Out of nowhere, 5 familiar looking mermaids were by a rock "Mermaids, fellas." Mickey whispered.

"They look like Minnie, Daisy, Magenta, Tori, and Layla," Will whispered.

They started to dance with the mermaids.

Meanwhile on the submarine, Goofy was reading a guidebook and read that lack of oxygen can cause hallucinations. Tranquility saw that Goofy had his food on an oxygen pipe and removed his foot from it. The divers stopped hallucinating and revealed their facing a kraken.

Then they heard someone saying, "55555555555555555555555."

It was The Professor's clam. They needed a way to rescue Prof. Von Drake and return him to the sub. Twilight got an idea. She told Goofy to turn on the light and start the clock. The noises distracted the kraken while Twilight and Will carried the clam to the sub. Everyone made it to safety and freed the professor from it. "642524." he calculated, "Wow, Who's ready to find a dragon?"

"I remembered that we have to meet the girls at Berk for their 300th annual Dragon Races," Will remembered.

"Can we join?" Mickey asked.

"Sure thing dudes," Zach replied.

"Let's go." Pinkie Pie shouted.

They got on shore and met Pleakley and Jumba who were on the ship. The girls were with them as well. They recently got back from Zootopia after defeating Bellwether's plan to separate prey and predators. They hoped onto the ship and headed off to Berk.