Peter borrows a crystal from the Ice Caves while exploring with the Lost Boys. His actions accidentally summon Kyros the Ice King, who is not pleased by this theft. The angry monarch retaliates by creating a huge blizzard in Neverland that freezes everyone solid. Peter has no choice but to appease the Ice King by returning the crystal - but first he has to thaw all his friends out so that they can help him. (thetvdb.com)