In Frozen 2, the elemental spirits have trapped a kingdom in a magical barrier for many years as punishment for building a dam to stop a river. The day is “saved” by an earth spirit incidentally destroying the dam and freeing the river. There was this whole thing about the spirits calling out to Elsa to come and save them, but apparently the spirits had the ability the whole time to break the dam. The whole plot was basically pointless. Maybe instead they needed Elsa to break the dam, or needed to combine their powers.