In this dark and final installment of the prequel trilogy, the galaxy two years into the Clone Wars, is divided between Count Dooku's Confederacy of independent Systems and the Republic, which is led by Chancellor Palpatine. In the political untrest, Palpatine schemes to end the Jedi order, dissolve the Republic and declare himself Emperor of the Galactic Empire, using his clone army and Sith Warriors to do so.
Lured by the power offereed to him by Palpatine, Anakin draws closer to the Dark Side. To complicate matters, he and Padme are parents to twins - Luke and Leia. Fearful of anakin's turn to the Dark Side, Obi-Wan confronts his former student and tries to dissuade him from joining ranks with the Sith. However, Obi-Wan and Anakin face each other in a duel - leaving Anakin wounded and presumed dead.
Palpatine seizes the opportunity and takes the injured Jedi under his wing. Using technology to help heal Anakin, Palpatine creates a new and very powerful Sith warrior - Darth Vader. With Vader at his side, Palpatine lays waste to the Jedis and Dooku's army and succeeds in creating the new Empire.
Now, Obi-Wan and the last remaining Jedis must rally to save the twins who have been separated to be raised unaware of each other's existence, and Princess Padme in hopes that someday the next generation will lead a revolution to unseat Darth Vader and the newly crowned Emperor Palpatine.