How to kill monsters?

In New York, where corporations have completely replaced the government and a person is worth exactly as much as their blood and organs, 27-year-old barista Ethan Hitchers lives as inconspicuously as possible. His only weakness is a girl named Marie, a street artist who paints pictures on the streets. One night, a drunk corporate heir kills Marie right in front of Ethan. The murder is ruled an accident. Ethan is offered $5,000 and a non-disclosure agreement, which he naturally refuses. The young man dreams of everyone involved disappearing, including Marie’s killer. That’s when everything changes: a man breaks into the guy’s place and offers him a little job… to kill a couple of vampires and not just them.