After falling through his computer screen, Zack travels back in time to a school in 999 A.D. where the students believe the world will end in the new millennium.
Eleven-year-old Rodney, his guardian robot Clutz, and his dog Aurora are taken for industrial spies when they wander into a soda factory where a new secret product named Fizzion is being manufactured.
When the slaves rebel against the rigid social order imposed on the colony by the all-controlling computer, Tomi, the son of the colony Overlord manages to escape beyond the computer's reach and discovers what it is like to be free.
While the Rebel Alliance continues its struggle to restore freedom to the galaxy, Princess Leia faces an old enemy bent on reshaping her destiny and turning her to the Dark Side.