A/N Hey I don't quite know how but somehow I have managed to do this chapter in a few days. Due to the quick typing I probably have a good few typos but I find it better just to get the chapters up rather than to agonise over them for ages. Also I would like to report a mistake as a very clever reviewer pointed out, Harry just turned 16 not 17! I thought I wrote 16 but my sieve like brain must have not seen the mistake!

Disclaimer: This story is based on characters and situations created and owned by JK Rowling, various publishers including but not limited to Bloomsbury Books, Scholastic Books and Raincoast Books, and Warner Bros., Inc. No money is being made and no copyright or trademark infringement is intended.

Summery: Post OotP Harry receives a 'what if' stone for his birthday and gets thrown into an alternate reality where Sirius was the potter's secret keeper imagine a world with an alive Lily, James and Sirius, and a rather confused Harry. (As usual this will not be slash…I don't write it.)

What if

Chapter four

Trust in me

Harry awoke abruptly the next morning with a heavy lump jumping directly onto his stomach. He sat up and blearily made out a large black shape sitting on his stomach.

He grabbed his glasses, which were on a side table. When he put them on he got the shock of his life. He was in the aquarium room and his dead Godfather in his Animagus form was sitting a foot from his face.

 In a 'whoosh' everything from the night before came back to him. He put his head in his hands "oh God," he said.

There was a faint 'pop' and Sirius said "Hey you don't look so great first thing either."

Harry looked up at him sadly.

"Hey are you ok mate?" Sirius looked so different to Harry. The time in Azkaban must have really taken its toll on him in the other world. He now looked so youthful and happy. Harry didn't want to tell him about his predicament, but the trouble was he had to tell someone.

"I'm fine, just hungry" he lied watching the squid floating past Sirius' head on the wall opposite.

"Great, me too, race you to the dining room." He said excitedly and jumped off the bed transformed into Padfoot and skidded out of the room.

Harry smiled and followed him out of the room. He nearly got lost on the way down, so by the time he reached the large banqueting hall he ate in last night.

Sirius was already tucking into a ridiculous amount of bacon sausages and various other fried food. He noticed no one else was at the large table.

"Hey, so you finally caught up, honestly I thought birds were supposed to be faster than dogs," Sirius grinned.

"Erm, still sleepy I suppose..." Harry trailed off not really knowing how to answer a question he didn't even understand.

"So," he said changing the subject "Where's Mum and Dad?"

"Work, you know that. You really must be tired," Sirius laughed at Harry who was buttering his toast.

"Right yeah sorry work." Harry was getting irritated that he could not even have a normal conversation with Sirius. He needed to talk to someone about the stone. "Erm I need to see Dumbledore quite urgently, is there any way you can get him to pop in at some point today." Harry said in between mouthfuls of toast.

"Harry what's wrong with you? I told you a few days ago the minister would be going to France to make an important speech on goblin peace," Sirius sprayed.

"Minister! Since when?! Dumbledore would never…but why?" Harry chocked on his toast and pushed the plate away. He just couldn't comprehend this. Why would Dumbledore be minister in this time? He knew he had been offered the job before Fudge, perhaps with no Voldemort around he felt that the children at Hogwarts did not need him as much.

Sirius now looked alarmed, he forcefully put his fork down. Slowly rose to his feet and pulled out his wand.

"You haven't a clue about anything you should…who are you? And what have you done to my Godson?"

Harry couldn't help laughing,

 "You sick-"

 "No, sorry its just that's a line Muggles say if someone acts oddly," Harry interrupted.

"Well you are acting oddly- how do you know what Muggles say?" Sirius kept his wand pointed at Harry.

"Oh, for goodness sake, I suppose I'd better tell you the truth," Harry realised with every word he said he just sounded less and less like he really was Harry. So before Sirius did something rash. He decided to just admit the truth; after all he needed to tell someone.

"Too right you better, where's my godson? If you've harmed a single hair on his head then I swear I'll-"

"Look its ok you can put your wand away." At Sirius' hesitance he said, "look I haven't got my wand I'm unarmed" he held his hands up.

"Fine, but you better tell me the truth."

"I will, Anyway I am Harry potter. You can use a truth potion if you want.

"But-"

"Let me finish, just not the Harry potter you know." Harry went on to explain in detail who he was and how he got there. By the end Sirius was looking at Harry incredulously.

Finally he said, "So you just switched dimensions, so that's why you've been acting oddly! Well I'm glad that's cleared up. For one second back there I thought you might lie, but no, travelling to a parallel universe is completely believable. In fact do you mind if I go and travel to another universe where I'm in prison?!"

"Oh for goodness sake, Sirius," Harry was getting irritated.

"No, that's enough," Sirius pulled out his wand "I gave you the decency to listen to your lies but you could at least have gone to the trouble to think up a feasible story!"

As a curse was on the tip of Sirius' tongue Harry shouted, "Stop"

"Look what can I do to prove to you I'm Harry?" I'll do anything," Harry pleaded this was really the last thing he needed.

Sirius looked shaken for a moment. "Well I guess I should give you the benefit of the doubt. I could ask you a question only Harry would know. Can you tell me what would wipe clean a certain piece of special parchment, created by four special people?"

Harry racked his mind. His other life seemed clearer this morning. So it wasn't particularly hard question.

"Mischief managed, created by you, Dad, Remus and Peter." Harry thought the urge to say traitor instead of Peter, he hadn't told Sirius much about his other life. Just that there was an evil wizard who wanted him dead, and right now he did not feel he was in a position to ask questions.

"Oh," Sirius looked taken aback. "Who cursed you on your first day at Hogwarts?"

"How am I supposed to know? No one in my other life," Harry felt annoyed Sirius will never believe him now.

"Oh right, well I can't think of anything you and me would both only know if you really are from another universe."

"I know," said Harry suddenly, "Give me your wand."

"No way you really think I'm that stupid?"

"My Patronus is a stag, I was going to conjure one up to prove it really is me."

"Oh well ok but I'm watching you" Sirius said suspiciously.

Harry snorted, 'that will do you good if I really am evil,' he thought as Sirius handed over his wand.

He conjured one up on the third attempt. (He found it quite difficult using another's wand.)

"Wow that's James!" Sirius exclaimed as he saw the stag charge around the large wooden table

"Ok, well I guess that's going to have to be enough for now. I don't think I have any choice at the moment but to believe your story." He said with a sigh as Harry handed back his wand. "And I thought it was going to be a day of fun and Quidditch." Though Sirius' face did not quite match his words he looked in awe at Harry. Harry supposed it wasn't every day another version of your Godson wonders in from another plane of existence.

Harry grinned "hey, I can have fun too, and just because I'm from a nasty world doesn't mean I can't play Quidditch."

Sirius smiled back "perhaps tomorrow, first we need to have a chat."

"We are aren't we?" Harry said as a House elf took his plate and disappeared.

"No I mean seriously."

"Wow" Harry said, "You are totally different to my Sirius."

"In what way?" Sirius allowed himself to be sidetracked.

"Well he loved joking around and he really loved danger." Harry thought painfully back to his godfather, though the pain felt less with Sirius in front of him.

"You just described me," Sirius said indignantly.

"No, you want to talk seriously, he wasn't terribly good at that,"

"I haven't told you what I want to talk about, it might be funny dangerous…" Sirius trailed off realising he was sounding pathetic.

"Right…"

"Well anyway we'll need to of course talk to Dumbledore but firstly I need to fill you in on the details, because I'm guessing from what little you've said you have no idea what's going on."

"Err, well, there's an Order of the Phoenix…I think," Harry realised he knew very little.

"Yes, there is. Do you know what its for?" Harry shock his head, "its Dumbledore's organisation of wizards who which to protect the Wizarding community against Feverius and the shadows, its kept a bit hush, hush so as not to alarm the public too much. In the past people have worked themselves into a real frenzy."

"Sorry, but what is Feverius?" Harry said confused.

"Feverius, You haven't heard of it? It's an illness created by 'the shadows', which spreads very quickly. Nasty virus, the shadows created it and there's lots of different strains which are all extremely contagious. We are constantly working round the clock to produce anti-dotes but all these different strains keep popping up. Your mother is wonderful, she's working on a universal cure for all forms of the virus. You dad is great at fighting the bad guys. In fact there is not that many left now, the only power they have over us now is the virus. I've been working with Dumbledore to find out where their laboratory is, that's where they are developing Feverius."

"Oh, not good, I'm surprised it's not in our world we seem to have the worst luck. I'm glad you are telling me all this, in my world they won't tell me much." Harry remembered Sirius sticking up for him in his other life wanting him to know what was going on. "So anyway what are the shadows?"

"Oh just a really evil group of wizards who use dark arts on just about everyone they meet." Sirius said in a mock light tone. "I bet there's nothing a fraction as bad as the shadows in your world." Sirius said puffing his chest out like they were all terribly brave to live in a world, which could harbour such evil.

"Really? They sound just like Death Eaters though." Harry said shivering at the thought of their last meeting.

"Death what?" Harry went on to explain to Sirius what death eaters were and about their master, Voldemort.

Sirius looked quite put out by the end. "Ah so maybe you do have a good idea of what 'the shadows' are like."

"Unfortunately, I think I have an exceptionally good idea of the pain and misery such people can bring," Harry said bitterly.

"You sound so grown up, Harry." He looked at Harry as if it was something to be proud of.

He suddenly felt angry, "well when you have no parents and an evil powerful wizard wants you dead your kind of forced into growing up fast, but it doesn't necessarily make it good."

Sirius looked positively shocked, "no parents…" he mumbled weakly.

Ah, he had not quite meant to say that.

He tried to explain but Sirius put his hand up, "I really don't want to know just now Harry."

"All I want to know Harry, and I regret I should have asked you this first, is why are you here, do you know?" but as he said this there was an exceptional sadness stirring deep in his brown eyes. It forcefully reminded him of the other Sirius who had lost so much.

Harry remained silent for a moment before pulling the stone out of his pocket, and laying it gingerly on the large table.

"This is it…" he went on to explain about the 'what if' stone, by the end Sirius was looking pretty worried.

"…And you say you have no idea who sent it to you? Harry that was extremely dangerous, what were you thinking?" Sirius asked.

"Well it's not like I exactly planned on coming here," Harry started angrily. He knew Sirius was simply overprotective but he didn't need reminding. But to Harry's surprise Sirius did not look in the least bit angry in fact he had a silly grin on his face.

"What…" Harry trailed off as Sirius started to laugh.

"Sorry its just you remind me so much of me and James at your age," he let out another bark of laughter. "The things we used to get up to…"

"So your not mad?"

"Me, nah but you should have taken me…I mean the other me!" Sirius smiled.

"Right," Harry did not meet Sirius' eye as he said, "I think you were a little tied up."

"Well anyway," Sirius said not picking up on Harry's odd reaction. "I've been thinking what happened to the other Harry when you came along?"

"That" said a new familiar voice from across the room, "is what I would like to know." Albus Dumbledore minister of magic stood by the fireplace looking directly at Harry.

A/N reviews…

Siripiritus : it's a bit pointless saying this now but yes people will find out about Harry being from another world!

Gilthas : LOL patience is a virtue I have wrestled with from may years (it's a tiring and sweaty business) anyway you will not find out why Harry cannot go back till a chapter or so. I have it planned though…I think! Oh and I have an interesting idea about time in this time and theirs. I may change my mind though. I'm glad I managed not to be cryptic, coz that would be really confusing!

Silvercrystal77 : yep people find out. He becomes quite the centre of attention. Next chapter you find out more about what happened to the other Harry…or if anything did.

A/N wow didn't I get that up fast? Much faster than expected especially when it's bigger than the last two put together! Because of all the effort I put into getting this up fast I expect lots of reviews!!! Predictions and suggestions are, as always, welcome.