The only rule to this though is that Mission only will help you to get through the sewers if you save Zalbaar from slavery after he was kidnapped by Gamorrean slavers. Later on when you arrive at the hidden beks base, their leader tells you to take Mission to get you to the vulkars base to find a stolen swoop bike so you can compete in an annual race to win Bastila from slavery. Eventually you will find mission Vao and her Wookiee friend Zalbaar.
So what do you do now? You save a man from davik's bounty hunters and proceed to a door to the lower city.
Find a lost Jedi on the quarantined world of Taris, and then rescue her from the clutches of the Black Vulkars.
