In need of new hyperspace routes due to Imperial pressure, the rebels find a shortcut but must first gain permission to use it.

To help recruit her people to join the rebels, Sabine reluctantly agrees to learn to wield an ancient Mandalorian weapon but finds the challenge more difficult than expected.

Hoping to get her family to help the rebels, Sabine returns home with Kanan and Ezra, and finds herself embroiled in her family's power struggle for Mandalore.

Trapped on Atollon with the rebel base under siege, Hera and Kanan fight to keep the squadron alive, as Ezra attempts to rally help from an unexpected source.

Sabine leads Ezra, Kanan and an army of her fellow Mandalorians back to her home world to rescue her father from the clutches of the Empire.

When Sabine discovers the Empire has resurrected a devastating weapon she created and plans to use it against her people, she must decide whether to destroy it or use it herself.