The whole plot is that this girl, has a bag of Marjiwana in her suitcase, when she went to Indonesia. So the girl opens up the bag, and see's the Marjiwana in the bag, and knows it is Marjiwana because of the smell.
Now, the laws in Indonesia are EXTREMELY strict against Drugs. The trial was to execute her. Now this might be strict, but there are A LOT of drug dealers in Indonesia, and I'd see why their so strict.
A thing I noticed was, they NEVER gave her a fair trial. The whole thing seemed to have been planned out, and sometimes I wondered if the court was listening enough to tell that this poor girl was innocent. They never checked for finger prints, even though a ton of people would just pass by, pick up a bit of the Marjiwana from the bag, and say something along the lines of "Shame". Then put it back, and walk away.
There were even some people outside of the court and stuff having signs saying to execute her. This whole thing was stupid. How about we Execute those people who are convicting this girl, without evidence, or a fair trial. This whole movie was messed up. That was why it was good.