Based on the infamous true story of an English heiress who became a revolutionary. Debutante Rose Dugdale (Imogen Poots) enjoys a life of wealth and privilege, but her rebellious nature soon leads her down a militant path. Amongst the political turmoil of the 1970s, her sympathy towards the IRA's conflict evolves into radicalization, culminating in an armed raid on an Irish estate with three comrades. However, when her simple heist takes a violent turn, is Rose prepared to face the devastating consequences?