A/N: This story has been teasing my mind for a few days now and I find myself unable to sleep until I start putting it on paper. Misty and Aurora Black belong to me.

I do not own Harry Potter but the plot line and characters you do not recognize belong to me.

Prologue:

Sirius Black stood looking at the remains of his best friend's house. He knew then that Peter had betrayed them. Sirius wanted to make Peter pay but he knew that Misty and Aurora needed him. With tears running down his face he walked into the house and found his best friend James dead on the floor. Upon hearing a noise that sounded like crying he slowly and cautiously made his way upstairs his wand out in front of him. More tears falling from his eyes when he saw the body of Lily but he was shocked to find out that Harriet was still alive.

With a whoop of joy, he picked the crying Harriet up and cuddled her close to her uncle Paddy. Knowing he must get Harriet to safety, Sirius Black quickly gathered what Harriet would need and then disapperated from the destroyed Potter house. Upon arriving home, he called for Misty so she could put Harriet to bed so they could talk. About half an hour later Harriet was fed and tucked into bed next to her god-sister Aurora.

"Sirius what happened?" Misty asked concerned as she noticed the tears still falling down her husband's face.

"James and Lily have been betrayed by Peter, they are dead. Poor Harriet was alone in the house and crying for her Mummy. I couldn't just leave her there." Sirius said more tears falling as he cried out the loss of the man and woman who were as close as siblings to him.

"We need to leave England until Harriet is ready to go to Hogwarts then. I do not feel she will be safe anywhere in England." Misty said while holding her husband and letting him cry out his pain.

"Where should we take the children Misty?" Sirius asked tears still falling down his face.

"Let's take them to my family home in Buenos Aires, no one will think to look for us there. After all, no one knows you married me and that we have Aurora." Misty said thinking of the home she grew up in.

"That is a good idea we can even put it under Fidelus Charm for extra safety." Sirius replied before standing up and wiping away his tears ready to take his family to a place of safety. At that moment he made a silent promise to James and Lily that he would make sure he treated their beloved daughter Harriet like she was his own.

Meanwhile at Number 4 Privet Drive.

Minerva McGonagall was watching the family that lived in the house and thought how horrible they were she had spent all day in her animagus form keeping an eye on the family. She knew Dumbledore would be arriving to deliver Harriet to her aunt's house and hoped to persuade him that it was a bad idea. Not long later a slight pop of apperation was heard and Albus Dumbledore appeared on the street before he took out an object of his own design and started clicking it. Each click removed a light from the street plunging the street into darkness. Once Dumbledore was done turning out the lights he started walking towards the house that Minerva had been watching all day.

"Are the rumors true Albus?" Minerva asked him a quaver in her voice like she was trying to fight back tears.

"I am afraid so Minerva the good and the bad." Dumbledore responded to her inquiry.

"And the girl?" Minerva's voice again broke thinking of two of her favorite pupils and their beautiful daughter.

"Hagrid is bringing her." Dumbledore again responded though he was now distracted by unsticking two lemon drops from the tin he had removed from his cloak.

"Do you think it wise to trust Hagrid with something as important as this?" Minerva asked shocked that he would trust the half giant with an important task.

"I would trust Hagrid with my life." Dumbledore replied popping a lemon drop in his mouth and offering one to his colleague.

Any reply Minerva was going to make was halted when Hagrid arrived out of breath and distressed.

"Harriet was not at the house when I arrived Professor I do not know where she is." Hagrid said a look of distress on his face.

"What do you mean she was not there?" Dumbledore demanded turning to look at Hagrid with an alarmed look on his face.

"I arrived at the house just as you instructed and I could find no trace of Harriet it was like she just disappeared." Hagrid responded sadly feeling like he had let the headmaster down.

"I must go check immediately something bad could have happened to Harriet and she is the girl-who-lived and is very important to our world we must find her as soon as possible." Dumbledore said alarmed and he rushed down the street and returning the lights to normal just before he disapperated to Godric's Hallow the last known location of Harriet Potter.

Back at the Black Family home.

While the children were sleeping Sirius, Misty and the house elves were packing everything they would need to take with them to Buenos Aires and making sure it was ready for them to leave first thing in the morning. Misty being a muggle born knew all about muggle transportation and felt it would be safer to travel like muggles then to travel internationally by magical means which would be easier to trace. By the time Aurora and Harriet woke up a few hours later everything was ready and they were bundled into the muggle taxi and on their way to the airport to catch their flight to their new home.

Sirius was carrying Harriet while Misty carried Aurora, the family took one last look at their home knowing it would be the last time they saw it until the girls were ready to start at Hogwarts.

Godric's Hallow

Dumbledore arrived in Godric's Hollow to investigate what happened to Harriet Potter. He knew she was the chosen one and was important to the magical world because of the Prophecy that was given just before her birth. He now knew it was Harriet who was meant to be the chosen one and not Natalie Longbottom. Until Harriet was targeted he felt it would be Natalie who was the chosen one but had both families go into hiding at the urging of Severus Snape who felt that Harriet was the target more than Natalie.

Upon searching the Potter house Dumbledore discovered that magic had been performed at the house since Voldemort had been there and he detected that Sirius had been there and it seems had taken Harriet away. This alarmed Dumbledore as he knew if Sirius had Harriet she would be out of his reach and he would not be able to control her future. Hoping to talk to Sirius he apperated to his home only to find that Sirius had taken Harriet and left. Figuring it would be easy to track Sirius as he was a pureblood and would most likely travel by magic he left to round up those he could trust to help him find Sirius and Harriet.

Dumbledore gathered Flitwick, McGonagall, Snape and Sprout to help him search for Harriet by magical means. They spent weeks searching for Sirius and Harriet to no avail. During those weeks Peter Pettigrew was captured during a raid on Longbottom Manor and was questioned about his involvement with death eaters. It was found out that he was the Potter's secret keeper and not Sirius and he had sold them to Voldemort. Frank and Alice Longbottom fought and killed Bellatrix, Rudolphus and Rebastian Lestrange and captured Peter Pettigrew and Bartimius Crouch Jr.

The years passed and nothing was heard from Harriet Potter. What would have been her first year came and went with no sign of her. Dumbledore had given up hope of finding Harriet Potter when his office door burst open and Minerva came in waving two Hogwarts letters excitedly.

"Harriet Potter and a girl named Aurora Black will be starting school in September. It would seem Harriet and Sirius are back in England. I didn't even know that Sirius had a child but it would seem he does." Minerva told Dumbledore very excited.

"That is good news Minerva we will have to see what house they end up in. It seems this next year will be very exciting." Dumbledore said making plans on how to get his hands on Harriet Potter and hopefully getting her away from Sirius' influence.