Ross Kemp travels to New York to explore the UK’s mafia connections. He meets Salvatore ‘Crazy Sal’ Polisi, a 1970s mafia enforcer, who reveals how British bootleggers in the 1920s helped build the American mafia. Ross then investigates the link between the UK and the American Mob, meeting the godson of Angelo Bruno from the Philadelphia mafia. He uncovers the Philly Mob’s ties to the Krays and the chaotic visit of Ronnie Kray to America before being smuggled back to the UK.