Han and Leia are on there way to New Alderaan to visit their children (who are in hiding) and decide to look for an old Jedi woman.  This woman, Vima-Da-Boda lives on the smuggler’s moon – Nar Shaddaa.  This isn’t exactly the safest place.  In fact the last time this group came here, they ran into Boba Fett.   This time however, they got the drop on Fett.