This story is currently under revision. Any suggestion for the storyline are welcome.

A man with his wife and their two babies were sitting in the garden in front of their house. Despite being in a war, the two adults didn't seem to worry about having to fight to survive the next day. The adults were James and Lily Potter and the children were Harry and Ella Potter. While Harry was already one and a half years old, Ella still was only two months old.
The family was in fact hiding and they had multiple reasons. One of them was a terrorist under the name Lord Voldemort and his followers that called themselves Death Eaters, who hunted down non-magical or muggles, their magical children or muggle-born - of wich Lily was one - and half-bloods - someone with at least two muggle grandparents.
Then there was that prophecy. The Leader of the Light and Headmaster of Hogwarts, Albus Dumbledore had visited the Potters one fall and told them that one of his applicants for the free teaching position in Divination, Sybill Trelawny, had spoken the prophecy - the contents were that only a boy who was born at the end of July to a pair that had defied the Dark Lord thrice could defeat the Dark Lord. Two boys, Harry and the son of one of the Potters' friends, Neville Longbottom, fell into that scheme, since Neville was born on July 30th and Harry on July 31st.
The family had to renovate Potter Manor since it was in a bad shape and James wanted to improve some rooms that could only be done with renovation. Due to the sounds made by the renovation, James and Lily decided to move somewhere else.
Dumbledore, whom both Lily and James looked up to, had suggested that they would go into a house in Godric's Hollow, which was owned by Dumbledore, and appoint someone as their Secret Keeper since there was no Fidelius charm cast. James, his friends Peter Pettigrew and Remus Lupin and Lily had decided that Sirius Black would be perfect to be the Secret Keeper, but Sirius wouldn't accept it since he was an obvious choice and would be tortured to get the location of the Potters. Dumbledore refused to cast a Fidelius Charm with Remus as the secret keeper and argued that he had the werewolf problem and thus had to go somewhere to transform - where he could accidentally let slip the location of the Potters and since most of the werewolves were Voldemort-supporters, they could run to him and tell that he's the secret keeper. As James and Lily didn't want to be their own Secret Keeper, the only other possible option was Peter Pettigrew.
"I hate it to stay here and not being able to see the Grangers," Lily said. The Grangers were muggle friends of the Potters with a muggle-born daughter Harry's age. Dumbledore had said it was too dangerous to go outside the area that was protected by the Fidelius Charm and it was too dangerous to take the Grangers in since it wasn't known what happened to Muggles under a Fidelius Charm.
"You've told him that Petunia would have volunteered to have the Fidelius Charm tested on her, Lily. She's one of the muggles allowed to do that testing and not in Danger from Voldemort, since you didn't tell anyone else about her," James said. He sighted."I hope Peter doesn't betray us."
"I still think it was a bad idea appointing Peter as secret keeper. I have a bad feeling that he is going to betray us."
"You know we held together like a family in Hogwarts. But why had Albus Dumbledore to decide that Sirius and Remus are unsuited to be our Secret Keeper? And Remus could have stayed here while he had transformed since you could have enchant a room to be strong enough and we could get another permanent bed easily."
"There's literally no problem with Remus being a werewolf. And my werewolf portion is actually effective enough to have Remus here without that transformation room. And you're forgetting that Sirius cannot betray us."
"Yeah, I forgot about that part. Even if he can tell the Death Eaters the location, he cannot tell Voldemort because of that and it is even for someone as powerful as Voldemort pretty much impossible to bring down Dumbledore's Fidelius charm. What's the advantage of Peter being the Secret Keeper, when anyone from my friends could have done the same Job as him?"
James sighted. "He should have taken your abilities in charms, Ancient Runes and Portions more serious. He should have known you were good and smart enough to do something like that. And you had experimented with. Both your portion and your enchantments would have been strong enough together for a werewolf. Remus could have transformed here. Go put the children into their beds."
"Yeah, I know. As if I wasn't good enough to protect three people from one werewolf when I managed to protect eight from two."
Lily picked up Harry while James picked up Ella.

"You're save with Mummy and Daddy because they always love you, Harry and Ella. Protect your sister well, Harry," Lilly said. Ella was already asleep, but Harry was still awake. She checked the runes she had written down. These should strengthen her sacrifice and force to be put on both Ella and Harry.
Lily sighted. She hated to be at war. A Dark Lord with the Name Lord Voldemort was rising and chasing down Muggleborns, people like her.
Then suddenly James screamed, "He's coming. Take Harry and Ella and escape. We meet at the secret location."
That caught Lily a bit off guard.
James said, "You cannot pass me, Voldemort."
Oh no, Lily thought. Peter betrayed us.
Then a new voice said, "Avada Kedavra."
Lily heard a body falling to the ground. Everything in her stomach tightened. No, not James, she thought.
A man, Voldemort, appeared in the door. He was holding a stick in his hand.
Lily began repeating, "Not Harry and Ella…Kill me instead…"
Voldemort said, "Stand aside, silly girl."
When she continued, Voldemort said, "Stand aside or I'll kill you."
Lily didn't stop.
Voldemort pointed the stick at Lily and said, "Avada Kedavra."
A green light appeared at the tip of the stick and hit the woman. Lilly screamed and fell to the ground.
Voldemort turned to the two children and pointed the stick at Ella and said, "Avada Kedavra."
Before the curse hit the girl, the boy rolled himself over and protected her sister. The curse rebounded from the boy. The curse hit its originator and he screamed in a high pitched voice. Seconds later there was a flash of light and the man had vanished.
After a while, Harry rolled back and you could see a red scar on his forehead and began screaming for his mother.

At another location a person with strange clothes appeared. The face couldn't be seen and there weren't any other gender-indicating features. The person approached a door and rang the bell.
"Yes, what do you want, Professor?" the man said who opened the door. "I want to talk with you and your wife," was the response.
The person was let in. As soon as the person was in the same room as the man and a wife, the person took out a stick and said, "Oblivate. You don't know about the wizarding world and you've never met James or Lily Potter." Both the man and the woman blinked their eyes.
"What's that man doing in our Room, Dan?" the woman said to the man when she came to her senses. The man, Dan, seemed to be only a bit behind his wife, as he immediately said, "Get out!"
The person complied without any refusal.

After that attack it wasn't the only live that had changed.
A man appeared in a street. He looked around as if he was on the run from something.
The man, Albus Dumbledore, didn't seem to have realized that he was not welcomed in this street. He looked for something in his pockets. When he retrieved it, he held it up and used it like an old lighter. But instead of a flame appearing one of the lights in the light posts was sucked into it.
Albus Dumbledore repeated this action eleven times.
He sat down next to a cat on a wall on the property of the Dursleys.
"Fancy to see you, Professor McGonagall.", he said.
Dumbledore looked back to the cat. Where the cat was sitting, sat an old woman.
"How did you know that I'm here, Albus?", Professor McGonagall asked.
"I've never seen a cat sitting so stiff.", Dumbledore chuckled.
"You would be stiff, if you sat the whole day on a wall. Why did you want to meet me here?"
"It's about the Potters."
"There have been rumors that Lily and James … that they're …dead."
Professor McGonagall had to spit out the word dead.
"I'm sorry, Professor McGonagall, but they are true."
Even if you didn't know Professor McGonagall very good, you could see that she was close to tears.
"And what's about their son, Harry? Sirius also told me that Lily was pregnant.", she asked.
"Harry survived the attack. The curse rebounded. Even I cannot explain it. Hagrid's bringing him."
Professor McGonagall jumped onto her feet.
"How could you let a boy like him let live here? They have a son who is so spoiled I've never seen. His mother had to drag him along the street while he kicked and screamed for sweets."
"To be honest, I would put him anywhere else, but his uncle and aunt are his only family left now. Also, is it a good idea to put a small child that can't talk and can't walk in the spotlight for something he might not remember?"
Professor McGonagall shook her head.
"You're right, Professor Dumbledore. The best idea is to put him away from our world."
"Are you sure that Sirius wasn't pulling a prank on you with Lily being pregnant? I've got no such information about her."
"I'm more than one hundred percent sure that it wasn't. It was three months ago when I remember it correctly.
And then they heard a roar like one from a motor.
Both of them looked on each side, but they didn't find anything.
Then they looked up and saw a motorbike dropping out of the sky with a giant sitting on him.
"Hagrid. At last.", Dumbledore said. "I think there were no problems retrieving Harry."
"Hello Professor Dumbledore, Professor McGonagall Thanks you mention it, Professor Dumbledore. There is a small problem."
"Which?", Dumbledore asked.
"I've found their two month old daughter.", Hagrid said.
Both Professors were surprised by it, Professor Dumbledore on a more grave extend. He also looked a bit upset, as if he was thinking Shit, I have to change my plans about Harry.
"How do you know it?" Professor Dumbledore asked
"Sirius came along and asked what I wanted to do. Of course, I told him that I was retrieving young Harry in your order. When I tried to separate young Harry and young Ella from each other Ella woke and both began wailing. He said that I also should take their daughter. Since I didn't know they had one, he told me everything."
Hagrid pulled out two packages.
"They've holding hands for the whole time. Ella was awake for the whole time, but Harry dosed of."
"That changes some things. But they still have to live here. I have to bend and change some things. I've written a letter. I'll change it shortly."
Dumbledore pulled out a parchment letter cover and a stick. He mumbled something and finally said, "Lie them down, Hagrid. I'll come back here in a few days. I want to place some wards over Ella protecting Harry and vice versa."
Hagrid lay them down. He looked sad. Professor Dumbledore lay the letter on them.
"Good night, Harry and Emma.", he said.
And then the three wished good luck and separated.
Harry grabbed the letter with his hands and rolled over, not knowing that he was famous in the wizarding world, not knowing he was forced to leave it, not knowing that hundreds of wizards lifted their glasses and say, "To the Boy Who Lived", not knowing that his sister and him were woken up by the scream of Mrs Dursley when she wanted to put the milk bottle on the stair.

I'm not updating this story regularly. The chapters will be at least 1000 words long, but I aim to 1500 to 2000 words.