"Andor" is set after the final movie of the "Star Wars" prequel trilogy, "Revenge of the Sith."
At this point in the story, the Sith, an evil power-hungry group of space wizards, have formed a Galactic Empire.
The empire's leaders, Darth Sidious and Darth Vader, have taken over the universe, killing their political opponents and wiping out their supernatural rivals, the Jedi.
"Star Wars" fans know that eventually, in the original trilogy, the Rebel Alliance is formed to defeat the Empire.
However, "Andor" sits between the two trilogies and will show how the rebellion is formed.