AN: The first part of this chapter is set when Amy and Rory were travelling with the Doctor, but after that it's set when Clara was travelling with him. It starts after "The Crimson Horror" but before Clara goes home to discover that Artie and Angie know she's a time traveller.
Also, I have very little idea where this is going, so it might take me a little while to get new chapters up.
Anyway, enjoy, and any reviews would be welcome. I'm trying to improve my writing, so I'm fine with constructive criticism, and feel free to point it out if I make a mistake.

1 – Ice in the Park

The block of ice stood in the park, stubbornly refusing to melt despite the warm sun shining down on it. The ice was surprisingly clear, and inside it was easy to see a teenage boy frozen solid. He was skinny, with brown hair that stuck up all over the place. His clothes hung off him, and he was barefoot. He was holding a oval shaped object. It was red and about a foot long, with thing yellow and orange lines criss-crossing its surface.

The block of ice stood on a small stone step, and it was enclosed in a metal cage to stop people stealing it. In front of the block of ice there was sign that read:

The first person to cause this block of ice some kind of damage (melting, knocking pieces off, etc.) is entitled to a reward of $100 pounds.
Contact the British Museum for more information.

Over its life, the block of ice had been subjected to bonfires, explosions, gunfire, a wide variety of hammers and had even been dropped off the roof of a three-story building. All of this had had no effect at all on the block of ice, so the British Museum, who claimed they owned it even though it had been found in a field in the English countryside, had placed it inside its cage in the park, and opened it up for the general public to give it all they could. They didn't expect it last long after that, considering the reward, but even the public couldn't damage it. Over time it became an impressive attraction, with people coming impressive distances just to see if they could melt the ice. No one could, but its popularity remained. Today was the middle of the week however, so instead of a group of sightseers attacking it with hammers, a man and a woman stood side by side just looking at it.

'How long has it been here?' asked the man. He was young, with brown hair, and he was wearing a tweed jacket and a bow tie.

'Out here? A few years,' said the woman. She was dressed all in black, with a veil covering her face. 'I'm not sure exactly how long.'

'And how old is it?'

The woman shrugged. 'Experts say it dates back to the Middle Ages, but that's just a guess based on what the boy is wearing. The reality is they have no clue.'

The young man walked forward and jumped up onto the step with the block of ice. He pulled something out of his jacket and pointed it at the ice. It made a buzzing sound, and a after a few seconds the man turned it off and looked at it.

'What does it say?' asked the woman.

'Nothing,' said the man. 'Well, nothing useful. The readings are confused. I've never seen anything like it.' He got down off the step and walked towards a blue box standing nearby. 'Still,' he said, 'it's not hurting anyone, so it's probably fine to leave it here.'

'Probably? You don't want to investigate more?'

'It's almost definitely safe. Even if it does melt, it's from the Middle Ages. The chance that the boy's still alive after being frozen for several hundred years is pretty small.' He opened the door of the blue box. 'Anyway, I'm meant to be picking Amy up in a couple of centuries, so I'd better get going.'

The woman tilted her head. 'Alright Doctor. Goodbye.'

'Goodbye, Vastra,' said the man. He vanished into the box, and a few seconds later it began to disappear, making a wheezing vrwoorrp, vrwoorrp, vrwoorrp sound as it went.

. . .

So the block of ice sat on its step for another couple of years. People had accepted it as part of the scenery, and all but the most determined had given it up as unbreakable. But one night in middle of Autumn, with no one around to see, the ice began to melt…

. . .

'Ma'am,' called Jenny as she ran into the house, shutting the door behind her. 'Ma'am, have you heard the news?'

Madame Vastra looked up from her breakfast. 'What news, Jenny?'

'The block of ice in the park, Ma'am. The one with the boy in it. It melted last night.'

'It what?!'

'It melted. Someone was walking past this morning, and it just wasn't there, so they went up and looked, and there was just this puddle of water.'

'What about the boy? Was he there?'

'No, Ma'am.'

'How did he get out? What about the cage?'

'No idea, Ma'am. It was still locked shut.'

'Interesting. The bars were far too close for anyone to get through,' said Vastra. She stood up. 'I think it would be best if we found this boy before the authorities. Get Strax and tell him to start looking. You go too. Try and cover as much of the city as you can. He'll probably be hiding somewhere. And tell Strax we're not trying to kill the boy, we're trying to help him.'

'Of course, Ma'am. What are you going to do?'

'I'll join the search shortly. First, I am going to try and contact the Doctor. This is something he should hear.'

. . .

Jaxon ran through the streets of London wishing he had shoes. The pavement was cold underneath his feet, but at least the running was helping him warm up. Waking up sitting in a puddle of freezing water in the middle of the night could not have been good for his health. It had been even worse when he'd realised that for some inexplicable reason his block of ice had been inside a cage, leaving him trapped. Then, as if he hadn't had enough problems already, the egg he'd been holding had hatched. Admittedly, he had been frozen so that he'd wake up when it was ready to hatch, but a newborn dragon really wasn't something he wanted to be dealing with while locked in a cage sitting in a puddle of water in the middle of the night. He could feel the little dragon on top of his head, and he smiled at the thought of it.

Jaxon turned a corner and slowed to a walk, panting. The wizards had cast spells on him so that his mind would absorb knowledge of the world around him while he slept, so he had a vague idea of where he was, and how to get out of the city, but running around barefoot dressed in clothes that were fashionable centuries ago was making him a little conspicuous. He cursed himself. He should have left in the night, but it had taken ages and a lot of focus to get out of the cage.

'Boy!' Jaxon jumped as a voice rang out behind him. He turned to see a man driving a horse and cart coming up behind him. At least, Jaxon supposed it must have been a man, even if the new information in his head didn't tell him anything about short, bald men with only three fingers.

'Boy,' said the sort-of-man again. 'Were you until recently frozen in a block of ice?'

'Yes,' said Jaxon.

'Good,' said the man. He picked something up from the seat next to him and pointed it at Jaxon. 'Come with me.'

Jaxon had no idea what the thing was, but in his experience having something pointed at you was rarely a good sign. 'What's that?' said Jaxon.

The man grunted. 'You primitive apes can't recognise decent weaponry if it's pointing you in the face. Come with me or I will melt your brain with acid. We want to talk.' He put emphasis on the last word as though it displeased him.

'Er…' said Jaxon, trying to focus his mind, which still felt fairly frozen.

'Strax!' yelled someone from behind Jaxon. 'What are you doing? Put the gun down.'

Jaxon turned to see a young woman running towards the two of them.

The man, Strax, put the gun back onto the cart next to him. 'I found the prisoner,' he said.

'He's not a prisoner,' said the woman, coming to a stop nearby. 'He's a guest.'

'Alright,' said Strax, sounding unsure.

The woman turned to Jaxon. 'You're the boy in the ice?' she asked.

'Not anymore,' said Jaxon. 'I've defrosted, so I guess now I'm just Jaxon, with an 'x', like in xylophone.'

'I'm Jenny,' said the woman. 'I think you should come with us.'

'OK,' said Jaxon.

'Because… wait, what?' said Jenny.

Jaxon shrugged. 'I said I'll come.' He pointed at the gun. 'I wanna know what that is. It looks dangerous. Do you have lots of dangerous things?'

'Strax has a few,' said Jenny. She frowned and narrowed her eyes. 'What's on your head?' she said.

'My dragon,' said Jaxon. 'Touch him and I'll flatten you.'

Strax smiled. 'He will do nicely,' he said.

Jenny and Jaxon climbed onto the cart next to Strax, and off they went.