The Ghost crew joins the growing Rebel Alliance, struggling to unite against the Galactic Empire. However, when a new Imperial threat arises on Lothal, Ezra leads the crew back to his home world to defeat the oppressive forces of the Empire, under the command of the cunning Grand Admiral Thrawn. Old friends are reunited and new allegiances are forged as the series builds to its epic conclusion.

Having established a secret base on Atollon, the Ghost crew strengthens the rebel fleet by acquiring new resources and recruits eager to stand against the Empire. However, the Imperial efforts to eliminate the rebellion are now being led by the coldly analytical Grand Admiral Thrawn whose strategic, tactical, and cultural insight make him a threat unlike any the rebels have faced before. Ezra and Sabine take on new roles and challenges as the rebels prepare for their biggest mission yet - a direct assault on the Empire!

The rebel crew of the Ghost is forced to leave Lothal in order to survive the growing Imperial oppression. Striving to make a greater impact, Ezra, Kanan, Sabine, Hera, Zeb and Chopper, join with another rebel cell, seeking out new allies and additional resources to build their fledgling fleet and help those in need. However, a terrifying new threat has emerged in the form of Sith Lord Darth Vader, as well as new Inquisitors, who have been sent to defeat the Jedi and crush the growing rebellion. Through dangerous rescue missions, thrilling space chases, and spectacular lightsaber duels, the crew will be put to the test like never before.