Freya and Gerda get married and soon fall in live with each other. Freya was a beautiful god and she was threatened to either marry Gerda or loose her beauty and riches.
After Balder was murdered by his own twin brother, all but some wept for him. Since not everyone wept for Balder, he was not brought back to life by Hel.
In this scene Loki had turned himself into a fly, to try to get through the keyhole, and had tried to steal Freya's necklace because it was the most beautiful of them all. But Loki had failed to steal it.