Y/n x Avengers

The avengers sre searching a hydra base and you're in your cell singing Tony: You hear that You keep singing and Bucky recognises your voice Bucky: Quietly Y/n You keep singing Wanda: Oh my god, she looks too young. Tony: How old is she...? Natasha: Y/n... Y/n!! You keep singing and Bucky turns a corner to see an array of cells, his attention is drawed to one of them in which you sit, curled up in a ball