Shortly after the Great Jedi Purge, a droid named T0-B1 (Tobi) lives on a deserted planet with his armless creator Professor Mitaka, and dreams of becoming a Jedi Knight. One day, Mitaka tells him that in order to become a Jedi, he must find a kyber crystal so he can forge a lightsaber. T0-B1 scours the planet, but finds nothing. He defies Mitaka's orders to never enter his basement, discovers a starship, and accidentally sends a signal that alerts a Sith Inquisitor to their presence. Mitaka reveals himself to be a former Jedi and hides both T0-B1 and his old lightsaber hilt...