Remembering the period of history when this was made you need to make excuses for several examples of shoddy movie making. Every racial stereotype of the bad guys is represented. Whereas the the immigrants to America are highlighted with every kilogram of patriotic fervour possible.It is a simple tale of how the government and phone company are at their wits end on how to stop Axis powers from wire tapping into the phone lines, hence gaining vital information from ammunitions plants regarding production and shipping schedules.Thereafter telephone company employees become vigilantes to combat those nasty German, Italian & Japanese agents.Don't expect a Hitchcock tale here, and you may enjoy it.