English is not my first language, so please don't be mad if there are errors in my text. This is my first story; (negative and positive) reviews are always welcome, but please be polite. I don't own H2O or any of its characters. If I did, there'd be a fourth season. Love H2O.
The story takes place right after the end of season 3, so there could be spoilers in it from the series.

There is a little part of the first chapter written from a POV of a character. This character is a mysterious girl, whose identity will be revealed in the 2nd chapter.

Summary: sort of 4th season: Emma and Bella meet, will they get along? Cleo is happy to see Lewis again and what is wrong with Rikki? And what happens with Ryan, Sophie and Zane?

"Good morning everyone. My name is Vincent O'Brian and you're listening to Radio GC. It's nine o'clock and the sun is shining. And we're gonna start this beautiful morning with No Ordinary Girl from Kate Alexa."
Cleo opened her eyes and yawned. It was a Wednesday morning during Summer Holiday. Graduation was about 3 weeks ago and it was today Lewis would come back for the US.

While Cleo's radio was still singing about mermaids in the ocean, Cleo stood up and got dressed. She looked disappointed at her cell. Lewis still hadn't texted her, which he'd promised her to do right when his plane had landed.

"Cleo, you've got visit!" Don yelled. When Cleo came downstairs she couldn't believe her eyes. "Surprise" he said, opening his arms to her for a hug. Cleo ran into Lewis' arms and squeezed him.
"Wow, it's only been 3 weeks since I left."
"For the second time!" Cleo said. "So, how was your flight?"

Two days later, Bella came home from her holidays. She had spent 2 weeks with her grandmother who lived in Wales, UK. Right after her homecoming she went to see Will. When she knocked on his door, there was a female voice that said: "Come in."
Bella entered and saw Sophie, sitting at the table, being busy with blue stones. Sophie turned around and smiled. "Don't you recognize this?" she asked, showing Bella a blue stone, similar to the stone of Bella's necklace.
"Where did you get that?" Bella wandered.
"Mako Island. These stones are worth a billion. It's only sadly that Ryan quit. But Zane is happy with the stones: after I've sold them all, we share in the profit and then the café can pay its debt."
Bella couldn't believe what she just heard: right before she left to Wales, Rikki had insured her that Zane would keep their mermaid-thing a secret. And now, she hears that he's going to exploit their magic for saving his café, that one he first wanted to give to Rikki. She decided to avoid further discussion with Sophie and asked: "By the way, where's Will? I came to see him."
"He went off, diving."
"But now I'm back. Hi babe." Will smiled at Bella.
"Missed me?"She asked him when they hugged.
"Yeah, a little. But there's something I need you to talk about. Sophie?" Will looked at his sister. She nodded and said: "Okay, I'm already leaving. My shift at the café starts right away, so if you need me, you know where to find me."
"Is it Zane you wanna talk to me about? Did something happen?" Bella asked worried.
"No, I've seen something that wasn't really normal."
"And what would that be?"
"A mermaid with long blonde hair, she looked a bit like you, but it wasn't you or Rikki."
"You've seen another mermaid?"
"Yes." Will nodded.

When I walked into the café, it was totally different. I ordered a Banana Beatbox, but the waitress looked at me like I came from another planet.
"The Banana Beatbox has been deleted of the menu for almost a year. Who are you, anyway? I haven't seen you before." She said to me.
"I've been away for a while. But I'm afraid I have to go. See ya!" I stood up and when I was heading for the exit I saw a familiar face. But why was Zane behind the bar?

Rikki was walking down the beach. Her favorite spot to be. Here she could let everything go and dream away. She could let take her away to wonderful places she'd been before, away to beautiful times that won't ever come back.
She was thinking about those times with that one person she hadn't seen for more than 7 years now, and she started realizing she would soon see that face again. She wanted to see that person again, only not in these circumstances. She wanted to-
"Rikki! Thank God, here you are!"
Rikki's thoughts were interrupted. When she looked up, she saw Bella and Will.
"Hey Bella, good to see you again." Rikki smiled. "Hi Will" She added quickly.
"Rikki, there's an emergency. Will thinks he saw another mermaid nearby Mako. I mean, is that possible? Is it possible that there are others out somewhere? Others like us?"
"I guess. A year ago, me, Cleo or Emma didn't know either that there were other pools like the one on Mako. It could be that there are others out somewhere." Rikki suggested.
"Wait, who's Emma?" Will asked.
"Emma was a friend of mine and Cleo's. She turned with us into a mermaid. She left the Gold Coast right before you two came here." Rikki answered.
"Maybe it was her. Maybe she is the mermaid that was swimming around Mako."
"I don't think so. Em would let me or Cleo know, if she'd come back."

After their talk on the beach, Will, Bella and Rikki went to the café. When Zane saw them enter, she walked right to them and said to Rikki he needed to talk to her. Rikki rolled her eyes, but after a little bagging of Zane, she went with him to the office. Sophie saw them together. He eyes only said one thing: jealousy.