Last time, we posed a question: What would happen if Mace Windu survived his fight with Palpatine during
Star Wars Episode III: Revenge of the Sith? Rather than falling to his death into the streets of Coruscant below, the heavily injured Mace Windu found himself falling into the cargo hauler of a kindly Duro by the name of Ram who was only too give the Jedi Master a safe haven while he recuperated
and fixed him up with a brand new mechanical arm.
On the reverse end of things, the fortunes of the whole Jedi Order had gone sour with Order 66. Escaping from Coruscant, Mace found himself visited by the Force Ghost of none other than Qui-Gon Jinn. Qui-Gon told Mace of coordinates to travel to, so that he might meet up with his fellow Jedi Masters Obi-Wan Kenobi and Yoda and perhaps undo the damage done by the revealed Dark Lord of the Sith and his new apprentice, the former Jedi Knight Anakin Skywalker.
Also, to give you terms of the time scale...this is about the point in the movie where Senator Bail Organa has linked up with Yoda and they are currently heading toward the ship carrying Obi-Wan Kenobi from Utapau, just to let you know what's happening at roughly the same time.
Picking up right where we left off, the ship that Mace had booked passage aboard in exchange for work was being pursued by a Republic...now
Imperial...Star Destroyer, demanding that they prepare to be boarded and searched for a suspected Jedi refugee.