[ the specifics of the people help narrow down what she wants to know -- what happened in the vault. but he needs to rewind, a little -- does pyrrha know about penny? has anyone told her? ozpin doubts it. ]

... the Vytal Tournament fell apart, after an incident between two students. The White Fang appeared, along with Roman Torchwick and his collective. Cinder captured communications, and hundreds of Grimm descended upon the city. They declared war. It was a trap.

[ ozpin pauses to take a sip of his drink, ruminating on that thought for a moment -- war... and ozpin sighs before setting his cup back down, looking tired. ]

I found you, in the courtyard, after it became clear that we could not fight back against Cinder and her army. You, myself, and Jaune descended into the Vault, in order to transfer Amber's power to you. But Cinder followed us, and attacked -- she killed Amber, and took the Maiden's power for herself. After I released you from the pod, I told you and Jaune to run -- and you both left the Vault.

[ he pauses, again ]

I fought Cinder, and was defeated. I am not dead. [ he says it at once, before pyrrha can say anything, or be worried ] I believe she took me somewhere, and I am being held captive, for whatever reason. After that, I have been told Cinder ascended to the top of the tower, to destroy it, and cut off communications.

[ here, his expression turns somber ]

I am also told that you followed her.