Something happens off screen that leads to Suzaku, Kallen, Zero, and Euphemia being relocated to an isolated island.
Prince Schneizel leads a mission to that island, but not to rescue them.
A mysterious artifact known as a thought elevator is located there.
It's possible that Britannia's wars of conquest are actually to capture these artifacts.
Meanwhile, Euphemia has figured out that Zero is Lelouch. The four lost people reconvene and are brought to Prince Schneizel by accidentally activating the artifact.