▁nom ination ▁for ▁Best ▁Original ▁Song ▁for ▁" In to ▁the ▁Un known ". ▁ ▁Plot ▁▁ ▁King ▁Ag n arr ▁of ▁Ar end elle ▁tells ▁a ▁story ▁to ▁his ▁young ▁daughters , ▁El sa ▁and ▁Anna , ▁that ▁their ▁grand father , ▁King ▁R une ard , ▁had ▁established ▁a ▁treat y ▁with ▁a ▁neighbor ing ▁tribe ▁of ▁North uld ra ▁by ▁building ▁a ▁dam ▁in ▁their ▁hom eland , ▁the ▁En ch anted ▁Forest . ▁However , ▁a ▁fight ▁occurs , ▁resulting ▁in ▁R une ard ' s ▁death ▁and ▁en rag ing ▁the ▁element al ▁spirits ▁of ▁Earth , ▁Fire , ▁Water , ▁and ▁Air ▁of ▁the ▁forest . ▁The ▁spirits ▁disappear ▁and ▁a ▁wall ▁of ▁mist ▁tra ps ▁everyone ▁in ▁the ▁En ch anted ▁Forest . ▁Young ▁Ag n arr ▁bare ly ▁esc apes ▁due ▁to ▁the ▁help ▁of ▁an ▁unknown ▁sav ior . ▁ ▁Three ▁years ▁after ▁her ▁coron ation , ▁El sa ▁celebr ates ▁aut umn ▁in ▁the ▁kingdom ▁with ▁Anna , ▁O la f ▁the ▁snow man , ▁Krist off ▁the ▁ice ▁har v ester , ▁and ▁Krist off ' s ▁rein de er ▁S ven . ▁One ▁night , ▁when ▁El sa ▁he ars ▁a ▁myster ious ▁voice ▁calling ▁out ▁to ▁her , ▁she ▁follows ▁it ▁and ▁un int ention ally ▁aw ak ens ▁the ▁element al ▁spirits , ▁which ▁forces ▁everyone ▁in ▁the ▁kingdom ▁to ▁ev acu ate . ▁Grand ▁P abb ie ▁and ▁the ▁Rock ▁T roll ▁col ony ▁arrive ▁and ▁P abb