MATH-BUD15
Anakin was taken hostage by the Sith and Grievous was captured by the Republic. What happens when Dooku offer of prisoner exchange. It's up to Padmé to convince the Supreme Chancellor that's it the right move. Sadly no one knows the Supreme Chancellor is Darth Sidious, (the one that has kidnapped Anakin) .
Anakin appears to be lost for good. As the clone war continues a mysterious Jedi-killer called Vader appears.