An interesting world with a developing story made by players choices.
The most prominent of which is the fight between the Italian Mafia and the CNPD. Gangs, crime lords, police, vigilantes, active citizens, and other criminals all fight for power and place in the city. Only those who focus hard and earn their mark's power can one use it viable to defend themselves as a sole weapon. New people will barely be able to do anything combat wise for awhile, mostly seeing their power as a niche and handy skill. These marks are generally a status of power, and how long one has been in New Cosa Nostra. The problem comes with the deal of entering, people are granted marks that are given to them. This all causes violence and chaos among order towards New Cosa Nostra. The gangs and mafias that want to rule control of the city through use of their given powers are breaking freedom of others.
Others try to take advantage and gain control of the city within, through righteous means such as police and vigilante acts. Some try to live their lives as normal as they can, trying to ignore the powers they were granted. The place brimming with sin and power of all kinds.
The city of New Cosa Nostra, a mysterious place that randomly takes would be travelers and seals them within.