Sheridan Smith steps in to the part of Charmian, the wife Ronnie Biggs, of this notorious excellent train robber. Chronicling Charmian life, from this fateful moment when her path crossed as a teenager . A episode which left also her family along with Charmian with one of the world's most wanted men busy. Facing an uncertain future in foreign lands, how the length of time are they able to avoid capture, with their children in tow?