Set in Naples, Piranhas is based on a book by Gomorrah writer and investigative reporter Roberto Saviani. Ambitious, charismatic 15-year-old Nicola and his mates go from being petty thieves to gun-toting gangsters virtually overnight. As the gangs' older generations are locked away in prison, the gangsters become younger and younger. The baby-faced protagonists struggle with family, peer pressure and romance, all while swaggering haplessly into a bloody war to control their streets. With almost anthropological detail about the boys' lives, fashions and tragically macho rituals, the film nods at genre classics like City of God and Martin Scorsese's Mean Streets, while staking out its own complex, thrilling territory.