Queenie Doyle ruled over south London gangland and her four daughters—Frankie, Mags, Sharon and Roxie—with an iron fist. When Queenie´s death brings the Doyle empire crashing down, the sisters grow apart. Eldest sister Frankie has a lot of love to give but her dreams are stifled when she becomes a mother to the girls at age 18. Crazy Mags committed the ultimate rebellion against her upbringing by joining the police force. Baby Roxie is living it up on the Costa Del Sol, but she leaves a string of dead men behind her. Sharon marries Monty and settles down to raise a family and to live a perfect life in suburbia until Monty dies in mysterious circumstances. As the Doyle sisters pull together to find out what really happened to Monty they enter a world of drugs, dirty money, and clean guns, risking their own safety to deal out their own brand of justice.