You thought that if you volunteered for HYDRA, you’d be able to protect yourself after being abandoned by your family. You touched the stone and survived, which was rare. Because of this, HYDRA kept you hostage even though you were only a teenager. At first, the stone seemed to have no effect on you, but when you started having small visions of horrifying things they soon realised that you could see into the future.
The visions could happen at anytime, anywhere, you had no control over them and froze on the spot when you had one. HYDRA kept you and used this to their advantage.
Finally, the Avengers rescued you and kept you at the tower. You’d been there for a few months and had a few visions, which the Avengers helped you through, unlike anything HYDRA ever did.
You were all relaxing in the kitchen and a living room, when you walked out of the kitchen only to pause immediately, dropping what you were holding as you fell into another vision, staring wide eyed ahead.