Moving throughout the freighter, the group avoids Imperial detection, eventually reaching cargo bay 17 -- a restricted area. There they find civilian prisoners, but Gerrera isn't interested in them. He wants that cargo. All of the prisoners are reactor specialists or mechanics, taken by the Empire for a top-secret project.

Ezra hears the song again, and Sabine gets them into the room it seems to be coming from. What they find, however, are death troopers. Sabine quickly throws some smoke-bombs.

The death troopers retreat, and the rebels have found the secret cargo...

It's a kyber crystal, massive in size. That's what Ezra heard -- it was singing to him, the same way the crystal in his lightsaber once did. Sabine warns that it could become unstable, and they must put their blasters away.

Saw debates with Sabine and Ezra what to do with the crystal. Without warning, he stuns them, determined to "learn the secrets" of his enemy. Saw wants to stay on the ship until they reach their destination -- he is convinced the Empire's superweapon will be there. But all they find upon exiting hyperspace is a Star Destroyer.

Gerrera takes Ezra's lightsaber and drives it into the crystal, turning it into a bomb. Beams of energy erupt from the crystal, blasting stormtroopers, and Sabine and Ezra part ways with Saw.

Sabine, Ezra, and Chopper escape with the prisoners on a stolen Imperial shuttle, and the Star Destroyer blows up in a brilliant explosion.

On the Ghost, the prisoners inform Hera that they've decided to join the Rebellion. Welcome news, but Kanan is troubled about the Empire's continued desire to secure kyber crystals...