New York is a city at war.
The Glasswalkers, wolves of the corporations and high rise towers, live in the towering spires of metal and glass above the city. But they still wage war against the Gutterrunners, the wolves of the streets and alleys, and against the Rat Hosts.
Packs form alliances, alliances that are only viable as long as each party is still useful to the other.
Because in a city like New York, your allies are often as happy to stab you in the back as your enemies.