Cornelia draws Zero into a trap, but he's geassed her subordinate, and defeats her.
Then he questions her regarding his mother's death.
His mother withdrew her own protection that day. And Schneizel retrieved her body for mysterious reasons; it wasn't in the coffin.
C.C. tells Lelouch than Nunnaly has been captured and he leaves the battlefield to find her on the hidden island.
The Knights backup leadership are not good enough to win in the confusion.
Cornelia tells Suzaku to follow Zero and bring him to justice. Kallen follows Suzaku.