Someone on another forum turned me onto two awesome concepts that could be used to make a game:
Concept 1: A Yakuza group in Hong Kong that is interested in learning and exploiting magical things to increase their foothold in the city.
Concept 2: 14 drowned, undead imperial concubines, each with a knuckle bone from Guatama Buddha giving them eternal undeath (or perhaps a persistent ability to reform), attacking a floating restaurant.
My current brainstorming has the runners hired by an Ares Johnson, who day-times as a supernatural affairs major for the Hong Kong police. Under pressure to solve the growing number of angry spirit incidents in the inner city, the police have been found wanting by the angry populace. He wants the runners (who specialize in magical drek-ups) to pull off a showy exorcism or two, then giving him all credit to restore his face. In return, he will influence some magical neerdowells to pay the debts they owe the runners.
I want to create a lot of exciting action and thriller type things with the yakuza and spirits, but since the players want a "one-shot" (in our parlance, 2 to 3 3/4-hour sessions) I am at a loss as to how to condense it into a more or less linear progression.