This is a House of Anubis crossover with H20: Just Add Water. This was an idea I got while thinking in the middle of the night. I really hope people like it. Don't forget to review! I love reading your comments! This is post- season 1 and pre-season two for House of Anubis; during season 3 for H20. Hope you like it!

I don't own House of Anubis or H20.

Chapter 1: House of Mako

Dear Nina,

I know that you aren't in America anymore and probably want to spend the holiday with your grandma but I really want to see you in person. We haven't spoken or seen each other in years so I want to invite you to spend at least two or three weeks in Australia with me and Uncle Howard. It's the best time of year to visit so the beaches and weather will be perfect. You can bring friends if you want.

Can't wait to see my favorite cousin!

Leo

Nina read and re-read the letter in her hand as she, with her best friends Fabian and Amber, trekked up the sandy path to a magnificent three story house. All three teens were excited to meet Nina's cousin and enjoy the beaches in the area.

As they approached the mahogany doors, a sandy haired boy about their age ran out and hugged Nina.

"Hey, cuz," he said, with a hint of an Australian accent, "Long time no see, eh?"

He broke the hug and noticed Amber and Fabian. "Who are these guys?"

Nina went over to her friends and hugged them both. "Leo, this is Amber. She's my best British girlfriend."

"Hey," Amber said, shaking Leo's hand. "I'm Amber, as Nines just said."

"And this," Nina said, 'Is Fabian. He's my best guy friend and my boyfriend."

Fabian blushed as he shook Leo's hand too. It would take him a little while longer to get used to the title 'boyfriend'.

"So this is Fabian?" Leo looked him up and down, then whispered to Fabian, "She's told me way too much about you."

Fabian gave Leo a weak smile and followed the boy into the house.

Dinner time saw the trio with Leo and Uncle Howard. Conversation was at its minimum while they all had their mouths full but, once the plates were bare, the questions came.

"So, Nina, how's your new school?"

Nina glanced at Amber and Fabian. They had, in their last term, had an adventure that Harry Potter would be proud of. But she wasn't sure if her uncle needed to know the details and, even if she gave a summary of the whole thing, with his questions details would be sure to come up.

"Just fine, Uncle. I have some really good friends to help me get through whatever troubles I may have." Nina put an emphasis on her last words to warn her friends not to mention the Search for the Cup.

"Ah, Mr. Howard?" Amber asked.

"Yes, my dear. And you may call me Uncle Howard."

"What's that pretty little island over there?"

Amber pointed out the bay window towards an island that was covered in forest. Seagulls circled over its highest peak. All three Sibunas were captivated by its beauty but Leo and Uncle Howard just glanced at it and sighed.

"That boring old place?" Leo said, getting up from his seat, "That's Mako Island. No one goes there much anymore. It's alright to explore, quite rainforest-like and rugged, but there isn't anything particularly special about it. Now, it's just part of the scenery."

"Why is it called Mako Island?" Fabian asked.

"Because Mako sharks swim in the waters around the island. The only way you can get there is by boat."
Interesting. The trio met each other's gazes and nodded. Silently, they agreed that, of all the places to visit and see, Mako Island had just been bumped up to the top of their list.

Leo hadn't been kidding when he had said it was rugged. Amber was struggling to keep from screaming as bugs flew around her. Mud caked their calves and they all had to stop to rest at intervals.

"Where exactly are we going?" Fabian asked as he handed Nina a bottle of water.

"I…don't…know." Nina accepted the bottle, grateful. The scenery was beautiful, she knew that, but the terrain was getting to her now. All of them were out of breath. Their rucksacks were beginning to weigh them down.

"Can we go back now?" Amber whined. "I've never felt more dirty in my life!"

"Come on Amber, a little mud can be good for you. Don't you want to stay fit?"

"Well, I want to stay fit in the comfort of Leo's house."

Amber was about to turn back when they all heard something: the rush of water. They found themselves on a slippery ledge and below them, gallons of water poured into a pool below.

"Wow!" Nina whispered. She took a step forward, slipped and fell into Fabian's arms.

"Thanks." She righted herself and carefully walked forward across the ledge, keeping her eyes on the waterfall.

Suddenly, she disappeared. Just fell into nothingness.

"Nina!" Amber screamed and rushed to the place where Nina disappeared. There she found a tiny hole, just big enough for someone to fall through yet small enough to go unnoticed.

Nina found herself at the bottom of the hole, covered in sand. A spectrum of lights shone around the room. "Nina." She heard a faint voice coming from the top of the hole. She scrambled to the opening and called to her friends. "I'm down here. I'm alright."
Amber and Fabian sighed with relief at the sound of their friend's voice.

"Come down guys. It's cool down here."

Fabian glanced at Amber. "Are you sure you're okay, Nines?" he called down.

"Yes, I'm fine. Just slide down here. It opens up into a cave."

Seconds later, the trio was walking around the cave. "We must be the first people to know about this place!" Amber squealed with delight.

But the truth was, Amber was wrong. She had no idea of knowing if anyone had or had not been in this wonderful place before. There was that problem with her assumption.

And she didn't know that, as she said those words, two people were hiding mere feet from them.

Two people who would eventually give her the experience of a lifetime.

What a beginning, eh? Aiming for at least 5 reviews before I update again. I've got the whole story mapped out in my head; I just need some confirmation that it's good enough to keep going.

Please review!

Warriorette 12