Chapter 1

"What changed?! What happened?" He shouted after me. I turned around and stormed back to him.

"You happened" I yelled. He stood looking at me, clearly confused. "And I don't know whether to slap you or thank you" I said softer, almost in tears.

Emily Sark was just another S.H.I.E.L.D agent. She had a wonderful brother, Tony Stark, and a great job. Until one day...when that all changed. Teaming up with Black Widow, Falcon and Captain America she goes undercover to try shut hydra down which has been building inside S.H.I.E.L.D since WWII. What will happen when she falls in love? And what will happen when the Winter Soldier destroys her life forever?

Dedicated to @Steves_Bae007 for everything and beyond.