Prologue

She fell back into the mirror, cracking the unstable surface, and failed to grab the girl as she fled once more.

The Black Widow raced to catch her outside, but that was the last she saw of the girl. The Captain and the Winter Soldier never saw her, though they searched zealously throughout the carnival. Tony had stayed behind at the warehouse to calm the Hulk and bring the Doctor back so they could not help.

The girl had escaped. All the Black Widow had of hers was the beanie still in her now bloody grasp, and bright copper stands hooked into fabric and floating aimlessly in the wind.

She was shocked someone had been able to get the better of her, to flee when no one has ever been able to do so. Despite that, she was smiling. She brought the beanie to her nose, breathed in the scent, and felt unbelievably warm. The scent of an Omega, one that was newly presented. The image of a roaring campfire on the beach with the sun setting and the waves crashing crossed her mind and encapsulated her senses. The mouthwatering taste of berries and almonds with a dash of vanilla, chocolate, and sea salt filled her taste buds. Her eyes drooped slightly, lost in the scent the Omega left behind.

That was how the Captain and the Winter Soldier found her. Sitting on the wooden steps at the entrance of the mirror house, blood pouring down her right arm, delicately holding the beanie in her left, breathing in the scent as if her life depended on it, to which it might as well. Both caught a whiff of the scent, but only the Soldier was as affected by it as the Widow. The Captain found it pleasant, perhaps even enjoyable to an extent, but it did not make him lose focus. No scent has ever done so.

That was the night the Avengers punished and ended a traitor. That was the night a battered girl watched her family die. That was the night where that girl became the one that got away. That was the night The Black Widow and The Winter Soldier swore to find the Omega and make her theirs.

That night was Halloween, and it changed everything