Leon and Bobby Anthony are brothers and members of the Deuces, a Brooklyn street gang who protect their neighborhood of Sunset Park. Ever since the death of their youngest brother Alphonse "Allie Boy" from a drug overdose at the hands of Marco, the leader of the Vipers, a neighboring rival street gang, they fiercely keep drugs off their turf. This puts them in strong opposition to the Vipers, who want to continue to sell drugs in the neighborhood. On the eve of Marco's return from a three-year stint in prison, a gang war seems imminent, as the Deuces violently retaliate with suspicion against Vipers muscleman and bookie Philly, who ekes out a vacant nightclub to establish business down the block. Marco, along with hoping to reestablish his drug pushing enterprise, plans revenge against Leon, whom he believes ratted him out to the police for selling the killing "hot shot" to Alphonse.