Brooklyn, July 1996. Punk kids have to make their own fun in the summer. Bobby Santovasco likes to throw rocks at cars getting off the Belt Parkway. Then there's Jack Cornacchia, a widower who lives with his daughter Amelia and reads meters but also has a secret life as a vigilante, righting neighborhood wrongs through acts of violence. A simple job to strong-arm a Bay Ridge con man, Max Berry, leads him to a tragedy that hits close to home.
Fast forward five years: June 2001. Charlie French is a gangster-wannabe trying to make his name. Bobby Santovasco - with no future mapped out and one big sin in his past - has taken a job working as an errand boy for Max. On a recruiting run for Max's schemes, Bobby meets Francesca, and gets the idea to knock off Max's safe so he and her can escape Brooklyn forever. Little does he know what Charlie French has stashed there.
Meanwhile, Bobby's former stepsister, Lily Murphy, is back home after college. One of her students is Jack Cornacchia. When she opens up to him about her stalker, a college boyfriend, Jack decides to take matters into his own hands.