Prologue: Make It Rain

"When the sins of my father

Weigh down in my soul

And the pain of my mother

Will not let me go

Well I know there can come fire from the sky

To refine the purest of kings

And even though

I know this fire brings me pain

Even so

And just the same

Make it rain"

-Ed Sheeran

The crunch of wood splintering downstairs had Rebecca O'Riley turning away from the window of her bedroom. It faced the front of the safehouse her father had holed them up in and she'd been watching the black nondescript SUVs pull up to surround the property. She had stayed silent when men in black kevlar and loaded rifles approached from all angles, giving no one any warning that they'd been found.

Now she could hear the shouting, the men from Interpol identifying themselves and placing every member of the Real Irish Republican Army in the house under arrest including Captain Declan O'Riley.

Rebecca didn't even flinch when two men burst open her bedroom door, rifles aimed as they shouted at her to put her hands up. She complied without struggle, falling in step with the one who grasped her left bicep to escort her out of the house.

"Where is my daughter?!" Declan O'Riley's voice was full of rage. "Don't you dare hurt her!"

"We're not the ones hurting her, Mister O'Riley. You and your acts of terrorism are." A deep gravelly voice cut off her father's shouting. The tone was full of patience, as if placating a child. "You're the one being arrested for murder, treason and piracy. You're the reason she no longer has a home. This all comes back to you."

Her father stood handcuffed between two men in tactical gear and was facing another man, not dressed in kevlar. The man speaking was African American, tall, fit and wore a patch over his right eye, his stance and expression belied a seriousness with no tolerance for nonsense. Another man flanked him, he stood almost a head shorter, with sandy blonde hair and a sharp eye. He missed nothing as he'd seen her arrival before she'd full descended the stairs into the foyer. He too was dressed in black, but instead of a rifle, he carried a bow and quiver, and his attire was sleeveless.

"Isn't that right, Miss O'Riley?" The man speaking turned to look at her once she approached them. "The blame for everything rests on your Dad's shoulders."

"Rebecca, it's going to be fine," Declan's brogue thickened when he caught sight of her. "I'll figure this out, don't worry. Just keep your mouth shut and-"

"It's a little too late for that. There's nothing to figure out, the evidence against you in damning, O'Riley. You're going away for a long time." The other man cut him off but kept his lone steady gaze on Rebecca. "She knows this. She knew the moment she made contact and eventually gave up this location."

Declan's expression filled with horror as the betrayal was revealed and he whipped back around in her direction. "Rebecca you didn't! Tell me you didn't betray your blood! Your people? Rebecca-"

"You killed my mother," Rebecca spoke for the first time since the house had been raided. Her tone was resolute and unyielding. "I'm not stupid, Da. You found out she was planning to leave you and you killed her. I won't protect you anymore."

"Take him away." The other man, the one clearly in charge of this operation, ordered.

"You'll pay for this!" Declan raged as he was dragged towards the front doors. "You ungrateful little bitch! You'll pay for this! You're just like your mother!"

His shouting grew more muffled as he was forcibly dragged out the front doors. The man who'd escorted Rebecca from her bedroom was dismissed and Rebecca found herself alone with the man in charge and the so far silent man at his side.

"Miss O'Riley," The Man who'd been issuing orders, gave her an unwavering stare. "It takes a lot of guts to contact Interpol and turn in your own father."

"My father is murdering bastard." Rebecca straightened her spine and met his gaze. "I've had enough. I'm not afraid of him or his threats anymore. No one else should be either."

"Miss O'Riley have you ever heard of S.H.I.E.L.D.?" He asked, folding his arms over his chest as he continued to regard her with interest.

"Sure, it's the largest counter-terrorism agency in the world." She shrugged, finally noticing the insignia on his long dark coat. "But I thought I contacted Interpol."

"You did, we're assisting Interpol today. RIRA is a terrorist organization and your father's faction, in particular, are on the most wanted. My name is Nick Fury, I'm the Director of S.H.I.E.L.D. this is Agent Barton." Fury gestured to the man at his side, who gave Rebecca a curt nod.

"Miss O'Riley you've been feeding intel to Interpol for months and then you were finally able to give up your location so we could arrest your father and the men in his organization today. That's quite impressive for a seventeen-year-old." Fury continued. "I understand you're turning eighteen in a couple months."

"April." She replied, wondering what his point was.

"We have an Academy in the United States, specifically to train S.H.I.E.L.D. agents. Normally we wait for candidates to graduate college or University, but we make exceptions. You have the makings of a great spy, the intel you leaked to us alone will put your father away for life." Fury frowned shrewdly. "Instead of going into a foster care system, I'd like to relocate you to the S.H.I.E.L.D. Academy, with the hope that you'll be working for us when you've completed training there."

"Me? A spy?" Rebecca blinked in surprise, having not expected that. She'd been prepared to enter the system for a couple months, lay low and then try to find a job as soon as she was legally an adult. She had no surviving family to take her in, her father had seen to that and she knew what her situation would be when they arrested him. She'd been ready for it.

"You'll be able to help take down more men like your father." Agent Barton spoke up for the first time. "We think you'd be good at it, with proper training." His expression warmed and she noticed for the first time that he couldn't be much older than she was. His serious expression had made him look older but he had to only be in his early to mid-20s.

"It's not going to be easy. The Academy is designed to push you hard so that only the best of the best graduate to become Agents of S.H.I.E.L.D. But you know something about living a harder way of life. You grew up inside RIRA." Fury studied her closely. "The spot is yours if you want it. If not, well, it's only a couple months before you're a legal adult and can do what you want with your life. The foster care system isn't so bad."

Rebecca stared at them for a long moment. She'd never considered herself a spy of any sort. She just didn't want her father to hurt more people than he already had. He needed to be locked up, away from society so he couldn't do any more harm. But she couldn't deny that it had felt good, knowing all the little moves she'd made, passing along information, copying files and emails, eavesdropping on meetings, recording when she could and sending it to Interpol. She'd known she was making a difference. Perhaps she could continue to do so, continue to help if she chose to go down this path.

"I'll take it." She decided after internal deliberation.

"Great. Agent Barton will escort you to the Academy." Fury gestured to the other man. "I hope I'll be seeing you again soon, Miss O'Riley, hopefully as an Agent down the line." He nodded to Barton before turning away, the hem of his long coat sweeping around him like a cape as he strode from the house.

Rebecca and Agent Barton regarded each other for a long moment before he inclined his head. "Come on, O'Riley," He gave a vague arm sweep. "Need anything before we get out of here?"

"Some clothes." Rebecca shrugged, knowing there was little else in this house she wanted. Her mother's things had been left behind in the last safe house before she "disappeared" and there was nothing her father possessed here that she wanted.

He nodded. "Pack a bag." He said. "Then let's blow this popsicle stand."

A/N: So I've wanted to write a Captain America/OC fic for a while now I just need the inspiration for the right OC. No offense to Emily Vancamp, but I'm just not into her portrayal of Sharon Carter. She doesn't have the same appeal as Peggy did and since that's not an option I kept trying to fabricate my own OC. Rebecca came to me in stages and I spent a long time planning on her history. Then I realized I needed to write this fic because a Prequel would be beneficial to the story I really want to write. The romance won't be established in this fic. I feel like with Steve, slowburn is the best way to go and Rebecca has her own set of baggage to deal with. I feel like the events during The Winter Soldier sets the foundation for their story so be patient. I'll try to make this non-Mary Sue like but Rebecca's role makes more sense post The Winter Soldier so bear with me if it seems that way. I tried to give her value in this fic, but not so much that it detracts from the other characters in The Winter Soldier.

So enjoy! Also I haven't seen Infinity War yet so please I'm begging you don't spoil it for me!