The quadruplets move far away from London because of an air threat, and Lucy immediately finds a magic wardrobe.
After Lucy is called crazy, Edmund checks for himself. He is immediately greeted and fed by the White Witch. Did I say he was fed with Turkish Delight?
When they all go to Narnia and find the Beavers, they chat with them. After a while, Edmund is recognized to be missing. He's actually about to betray everyone and start a war.
When Edmund comes back and opens his big mouth to tell her where everyone is, she immediately gets on her sleigh with Edmund and gives him milk water and stale bread. She has to make him pull it after it turns into spring and stops the sleigh from working.
Then, right after, everyone fought a war and then the White Witch died.