Shirley runs in to help, and meets Rolo doing the same.
After a tense check that they are really on the same side, she tells Rolo that she wants to help make Lelouch happy. To help him reunite with Nunnaly.
That's why he finds her lying in a pool of blood. She dies in his arms.
Lelouch pinpoints the cult of geass' headquarters and attacks with the black knights.
They kill the researchers and the experiments, some of whom are children.
Lelouch corners V.V., but a magic door opens and Charles is there, and Lelouch is pulled into a vision.