The true story of glamorous crime queens Tilly Devine and Kate Leigh, and their deadly battle to control Sydney's underworld in the 1920s.

Furious over Tilly's decision to kill Norman Bruhn, Kate sparks an all-out war by recruiting Tilly's prostitutes to sell cocaine. Snowy Cutmore returns to Melbourne for a fateful showdown with crime boss Squizzy Taylor. Fresh from his first kill, Frank 'The Little Gunman' Green wins the ultimate prize — Nellie Cameron. But can he keep her?