During WWI, the young Boudreau sisters decide to aid the war effort by catching spies. The strange activities of Nobel-Prize winning scientist Marie Curie make her a prime suspect.During WWI, the young Boudreau sisters decide to aid the war effort by catching spies. The strange activities of Nobel-Prize winning scientist Marie Curie make her a prime suspect.During WWI, the young Boudreau sisters decide to aid the war effort by catching spies. The strange activities of Nobel-Prize winning scientist Marie Curie make her a prime suspect.