Needs work, but here’s at least a starting point.
The Republic has fallen. It its wake, the Empire has engulfed the far reaches of the galaxy in fear. Few oppose the unquestioned rule of the Emperor.
Brilliant scientist Galen Erso has gone into hiding, fearing his work will be turned against Imperial citizens. Rebel extremist Saw Guerrera has protected his family from their pursuers.
Director Orson Krennic has discovered the location of his former comrade, and is intent on reapplying him to the task of completing the Emperor’s ultimate weapon…
EDIT: or this one…
The Republic has fallen. It its wake, the Empire has engulfed the far reaches of the galaxy in fear. Few oppose the unquestioned rule of the Emperor.
Galen Erso, a brilliant scientist whose knowledge has made him a valuable asset, has gone into hiding to prevent his skills from being used for the Empire’s efforts.
Director Orson Krennic has discovered the location of his former comrade, and is intent on reapplying him to the task of completing the Emperor’s ultimate weapon…