Meet the Bang-Bang Sisters: Brea, Jessie, and Flo. Together, they're a killer rock band with an unbreakable bond. But that's only half the story. Offstage, they're highly skilled vigilantes, traveling the country in their beaten-up tour van to exact justice on criminals who have slipped through the system. Part rock stars, part assassins, they're a force to be reckoned with. Drawn by a tantalizing lead, the sisters head to Reedsville, Alabama - a city crawling with destitution and corruption - where they close in on a notorious serial killer known as 'the wren.' But they soon discover that they have walked straight into a trap set by Chance Kotter, a ruthless mobster with a personal vendetta.