Prologue

Elsa is possessed by Pitch* throughout her childhood, terrified of hurting someone with her powers. Now that Elsa is free, can Jack help her? And how can he tell her about the reason why her powers exist?
*(For those who don't know, Pitch Black (or the Bogeyman) is the antagonist in Jack's feature film, "Rise of the Guardians").
Disclaimer: I do not own Frozen or Rise of the Guardians.