Years later, see a rebel spy, Cassian Andor (played by Diego Luna) find information about a potential weapon called a planet killer (a.k.a. Death Star) and its creators. It leads to them finding and extracting Jyn from Imperial capture. While Jyn was being extracted, she reacted like any normal rebellious fighter, she rebelled.
Busting out and was able to smell fresh oxygen until a reprogrammed imperial droid by the name of K-2S0 (played by the lovable Alan Tudyk), "congratulated" her for being rescued. The rebels gave her an offer she couldn't refuse, help them find Galen and they would let her free. Cassian, K-2S0, and Jyn then headed off to the planet of Jedha to find a imperial deserter and friend of Galen Erso, Bodhi Rook (played by the multi-talented actor and rapper, Riz Ahmed). What made this really interesting is although Jyn was looking to get her father back, Cassian was under orders to kill Galen once he was found.
The group arrived on Jedha and were soon in the middle of a rebel attack on the Imperial controlled planet that was harvesting crystals to power the Death Star. After an insane battle, they are soon surrounded by Imperial forces. It wasn't until a blind warrior, Chirrut Imwe (played by Ip Man and martial art master, Donnie Yen), and his gun totting heavy sidekick, Baze Malbus (played by Jiang Wen) that they were able to escape the Imperial forces. That didn't stop them from being captured by a splinter rebel forces group. They were taken to their leader, who just so happened to be, Saw Gerrera.
Saw Gerrera gives Jyn a holo message from her father where he explains that he created a flaw in the Death Star (the one we are all familiar with) and that the plans needed to be given to the rebels right away if they were to have any chance to defeat it. It was at the end of message that the Empire planned to test the power of the Death Star on the Jedha. Not utilizing its full potential, they focused the attack solely on the city of Jedha. The rebel group, including their new friends and deserter pilot all left the planet just in time to escape the devastating effects of the Death Star's blast.
With the help of the former imperial pilot, they go to Galen's base of operations and hope to extract him (or in Cassian's case, kill him). As they try to fly under the radar on the stormy planet, they crash land outside of the landing area. Cassian and Bohdi leave the ship to find Galen, Cassian hoping to assassinate Galen without Jyn knowing. However, the wise words of blind Chirrut cause Jyn to go after her father. The
The attempt goes array after Rebel ship are dispatched to the base and attack. The attack leaves Galen dead and the extraction plan ruined. They regroup at Yavin 4 and talk with the rebellion council to encourage an attack at Scarif to retrieve the Death Star plans. Although his had split support, ultimately the council decided against it. Cassian, trusting Jyn, gathers a small group of rebel fighters and take a stolen Imperial ship named Rogue One to the Scarif.