Speak to Lurze Kesh outside the cantina here; he'll ask you if you wouldn't mind unlocking a hidden smuggling container on your ship and delivering the contents to him. You can find the container in the cargo hold of your ship, where all the supplies are; if you bring the spice back to Lurze, he'll pay you 1,000 credits, and offer you a courier mission to Motta the Hutt, the swoop track kingpin on Tatooine.
Should you decide to take him up on the offer, a "mysterious box" will be placed in the cargo hold of the Ebon Hawk. Lurze will warn you not to open it, and with good reason: it'll eat your soul and place it inside a prison without walls. You'll encounter your first member of the Rakatan species inside, if indeed you do choose to open the box; in order to escape, you'll have to challenge him to a duel of riddles. The solutions to the Rakatan's riddles are, in order: "time," "tomorrow," "a grave," and finally, "a flame." After you answer all of his riddles correctly, the Rakatan will return you to your body. If you return the box to Motta at the swoop track in Tatooine, he'll give you 2,000 credits for your trouble.