Series premiere. When rich girl Gladys Witham takes an office job at Victory Munitions, she discovers a new world — a fascinating sisterhood and a cause that she hopes may change her life. It's 1941 and Canadian men are at war, leaving their wives, daughters and sweethearts to replace them in the bomb factories. Orbiting this new working-class world, Gladys meets the gals of Blue Shift, including Betty, a tough farm-girl; newbie Kate, who's running from a violent past; and the glamorous Vera. Governing them all is Lorna, their formidable shift matron whose stern exterior masks a conflicted soul.