Someone explain to me what's happening, it feels like we skipped a ton of scenes or someth...

I think it will be revealed later how Key/Kai overcame the holy sword. I think Alicia stabbed him so he could become it’s master. There are 2 holy swords remember?
And now we see Key is awake and demanded to see his sister. The douche duke imprisoned him in a secret dungeon instead. And tortured Zorju to make sure he doesn’t help Key escape.