AN: I don't own any of the characters from the Sarah-Jane Adventures. I only own Sky's friends and the Sting-Mites. I also don't own the original idea. I wrote my own version and did it with Sky instead. It belongs to AmyVS7 so be sure to check out her stories as they are really good.

Sky's POV- Saturday, 1:00pm

Today, Alice, Darcey, Tilly and me were going swimming at the new pool. I'd only been swimming a few times and that was so I knew how to swim.

The four of us walked the long 20 minute walk to the leisure centre. When we got there, we payed for the two hour swim.

We each went into the changing rooms to get ready. I had a dark purple swimming costume that Mum bought me. I also had a pair of blue goggles.

When we were all ready, we went in. We first went around the lazy river. We went around 5 times. Then we queued up for the slides.

There were 4 slides. Red, orange, yellow and blue. Darcey went on blue, Tilly went on red, Alice went on orange and I went on yellow.

We all met up at the bottom. As we were going back into the lazy river, we saw a boy come out with an injury on his arm. He was wincing in pain.

I felt sorry for him because he looked very young and his injury looked very bad. We went around the lazy river a couple more times.

As we were going around again, I felt a sharp sting go into my leg. I cried out in pain. All of my friends quickly approached me.

My leg hurt so much that I couldn't move it without pain. My friends helped me get out of the pool. I looked at my painful leg. It was bleeding.

Thankfully, there was a paramedic by the girls changing rooms. There were lots of people with the same type of injury as me and the paramedics were called immediately.

Alice told the paramedic everything that had happened. We went into the changing rooms and I sat down.

"So, can you tell me what it felt like?" The paramedic asked.

"It felt like a sting go into my leg." I told her.

"Does it hurt to walk?"

"Yes. Can someone call Mum please?"

"Of course. I'll ask her to pick you up." Said Alice.

"Thank you. Can you also tell the girls what's happened?"

"Yeah, I'll do it now. You get changed."

I gave her my phone so she could call Mum for me.

I changed into my clothes. The paramedic put a bandage over my injury once the bleeding had stopped.

When we all got changed, Alice and Darcey helped me walk to the car. Mum was waiting for me, and she looked worried.

She kindly offered to take the girls home. I sat in the back with Alice and Tilly. Once all of the girls had been dropped off, I got in the front.

Mum drove around the corner then stopped when there was no one around. She scanned my injury.

"Mum, it hurts! Make it stop!"

"Ok. Calm down. It won't hurt for much longer."

She was using one arm to scan my leg and the other to hold my leg.

"What does the scan say Mum?"

"You've been stung by a sting-mite. It's alien. I need to text Clyde and Rani."

"Why are you texting them?"

"I'm going to ask Rani to go to the attic with my first aid kit and one of my worn down towels. I'm going to ask Clyde to buy some sea salt."

Once she texted them, she drove off.

"Ok Mum... so what are sting-mites?"

"A type of alien fish. They aren't deadly, but they sting their victims. I think they're trying to take over the pool you went to."

"Why are they trying to take over the pool?"

"Because I think the chlorine helps them make their powers stronger."

"How do we stop them?"

"Salt water according to the scan. It's deadly to them. If we can manage to get some salt water into the pool, they'll either die or try to get back to their home planet."

"So do you have a plan to stop them?"

"Not yet. I'll figure one out. Don't worry Sky."

"Mum, I feel really faint. My leg hurts."

"It's ok. The sting does that to you. You'll be ok. We're almost home."

Then, everything went dark.