R2-D2 is lost during a fierce space battle -- and Anakin must find him before the Separatists discover the Jedi military secrets locked in his memory banks.

Anakin, Ahsoka and replacement droid R3-S6 embark on a dual rescue/sabotage mission when they discover R2-D2 is being held at General Grievous' secret enemy listening post, Skytop Station.