Having barely escaped total destruction of the rebel cell Phoenix Squadron by Darth Vader, Ahsoka Tano sends the Ghost Crew to locate a former military commander somewhere in the Seelos system who has the knowledge of useful hideouts in the Outer Rim. The crew discover the commander to be former clone trooper Captain Rex, accompanied by Commander Wolffe and clone commando Gregor. Kanan is immediately hostile due to the clones' role in Order 66 although Rex claims they removed their brain chips. Ezra negotiates with Rex for information relating to potential bases. In return Gregor enlists them for a hunt by using Zeb as bait to catch an elusive Joopa. With the hunt successful, Rex holds up his end of the deal but Sabine discovers that Wolffe betrayed the Ghost crew's location to the Empire. A skirmish with an Imperial probe damages the Phantom shuttle, the crew is temporarily stranded with the clones waiting for an Imperial assault.
Set five years before "Star Wars Episode IV: A New Hope" following the fall of the Galactic Republic and the Jedi Council, the series follows a motley group of rebels (all of whom have been affected by the Galactic Empire in one form or the other) that band together aboard a freighter starship called the Ghost. The series will also focus on the origins of some of the groups that form the Rebel Alliance.
Using the life of the Skywalker twins (Luke and Leia) as a measure, the series will be active in the story years that come after their separation as newborns and before their (unwitting) reunion on the prison level of the Death Star.