Cursed, Tainted, Broken

Just outside of Arendelle there is a place where once a week no matter the season, snow falls. Elsa goes to investigate and finds a boy named Jack Frost with powers similar to her own. However, his abilities come from dark curse. Under this burden, he fears he can only cause destruction and pain. Elsa is determined to help him break the curse, no matter the cost. Jelsa AU!ROTG