Conceal, don't feel. That's what Elsa had been taught almost her whole life. She remembers that day, that day when she struck her sister Anna with her magic and almost killed her. If it wasn't for the trolls she would not be alive. But the magic? It kept getting stronger. Nothing was stopping it from making Elsa lose control, and that's exactly what it did. On the day of her coronation, Elsa got upset, a very dangerous thing for her, and exposed her magic, another very dangerous thing to do. She flees to the mountains, hoping to get some solitude so she cannot hurt anyone, especially Anna, any longer. After building a fortress for herself, Elsa is finally reveling in the fact that she's alone and everyone is safe from her power. That is, until Jack comes along.