This is my first Harry Potter/Avengers Fanfiction and feedback would be great! All opinions are welcomed, but please don't be rude. Thank You :)

Disclaimer: I known nothing except my own original ideas

Summary: Bella Potter knows she was adopted, but she certainly didn't execpt her biological parents to show up! Nor did she expect to discover that she was kidnapped! After losing Sirius and Remus has Bella found a new family? And what'll happen when you add the danger of being the daughter of two superspys/Avengers to being the Chosen One? A whole lot of trouble.

Prologue

"AHHHHHHHHHH!" Natasha Romanova-Barton's scream echoed through Avengers Tower at five am abruptly waking the other Avengers, Jane and Pepper and causing them to come running towards Natasha's screams. Clint Barton, Natasha's husband of three years was the first to arrive on the scene. Natasha stumbled into Clint's arms tears rolling down her cheeks and screaming with anguish, out of character for the usually collected spy,

"Nat?" Clint asked frantically gripping Natasha's shoulders, "Nat? What happened," By this time the rest of the Avengers, Jane and Pepper were all standing behind Clint. Natasha looked up from where she was sobbing in Clint's chest,

"She's gone!" Natasha sobbed frantically, "Mirabelle's gone!"

"What?" Clint whispered quietly as if he was in pain. Natasha managed to pull herself together slightly so that she wasn't screaming/sobbing anymore and lead Clint to the empty crib that had housed their two month old daughter, Mirabelle Katya Barton. The stuffed animals that had lined the sides of the crib had all been slashed and their stuffing was hanging out and where Clint had seen Mirabelle and her favorite stuffed animal, the purple hawk with the spider of its heart that Tony had gotten custom made for her, just a few hours ago when he had woken up to check on her was a note with words written so largely that you didn't even have to bend down to see it. The note said, "Good luck getting your daughter back," and Clint could practically see the cruel smile of whoever had taken his precious baby girl,

"No," Clint whispered pulling Natasha closer to him and burying his face in her hair and starting to cry. Natasha began sobbing again, "No…"

BPBPBPBPBPBPBPBP

"You enjoying the food, Lils?" James Potter asked his wife Lily,

"Yeah, it's delicious," Lily replied. The young couple was sitting in the Taverne de Neptune a restaurant in Lacanau Océan, France. The Potters had been in Lacanau Océan for eleven months gathering information on French wizard Lothaire Brisbois, who was in league with Lord Voldemort, and his men. But tonight, Lily and James had decided to go out for dinner and act as tourists. Both Lily and James were part of the Order of the Phoenix, but didn't trust Dumbledore as much as some of the others did, while they respected him it only went so far. So when Lily and James, who were both Aurors, were sent by the Ministry to France they didn't specify why they were going. In fact, James had made it sound like he and Lily were going on a yearlong vacation since they didn't really go on a honeymoon after they married. After the couple was finished eating they paid the bill and left. They hadn't even got to the end of the street when they were hit by a magical pulse. Lily and James had both learned in Auror School that a magical pulse is often sent out by children doing accidental magic when they are in danger and can't save themselves and so the couple hurried to the origin of the magical pulse. The origin of the pulse was a burning building and the building was so encased in flames that Lily and James feared they were too late when the sound of an infant crying reached Lily and James ears,

"It's coming from there," James said motioning to a part of the building that was almost completely gone and a staircase going down could clearly be seen. Lily hurriedly followed her husband down the stairs and the couple was greeted with the sight of a tiny baby wrapped in an old blue blanket Lily ran to the baby, picked it up and started rocking it while James looked around. A burning piece of paper caught his eye. James extinguished the fire with his wand and picked up the paper. It said:

Mirabelle Katya Ba

July 31, 2014-11:59 pm

"Lils, Look at this," James said showing Lily the picture,

"That must be her name, but her last name's been cut off,"

"Yeah, lots of last names start with Ba, she could be Babineaux, Bateau or Baudin," James said listing all the French last names that started with Ba,

"She might not even be French," Lily reminded, "I'm a hundred percent sure that this place was abandoned. Mirabelle was probably put here,"

"By who?"

"I'm not sure…We should probably leave," Lily said once she heard the sound of approaching fire engines. James nodded and the pair apparated back to the flat they were renting. For the next month while James went out to gather the final bits of information on Brisbois Lily took care of Mirabelle, who the pair had begun calling Bella, and searched all of Europe for any reports of a missing two-now three-month old named Mirabelle Katya, but found none. Over the course of the month Lily and James had Bella they had grown close to her and when they failed to find her parents, James suggested that he and Lily take Bella back to England as their own. Lily agreed and James went out and put false memories into all the required people to make it appear that Lily had given birth to Mirabelle Katya Potter on July 31 at 11:59 pm, making Bella officially their daughter and giving her both French and English citizenship. Their plan was perfect considering they had been ordered no contact, so it would explain why none of their friends knew of Bella's existence. Lily and James Potter intended to live long happy lives with their daughter, but unfortunately, Lord Voldemort would prevent that.

Please Review and Tell me what you think :)