The missing judge
One day when the players are sitting at their favorite barrens soycaf place a full scale gang war breakout right in the street where they are sitting. If one of the runners has a gang contact he or she can tell the runner that someone has kidnapped the judge, if no runner has such a contact perceptions checks will reveal that the gangs are accusing each other of the crime.
The judge is a powerful mage who acts as a broker between the gangs to avoid conflicts that could escalate to a war.
He has in fact been kidnapped by an agricultural firm by the name of Sivak which is in league with Wuxing and they are looking to expand into several areas of the barrens inhabited by the gangs.