Factory girl Joan Dodd (Medina) and Jack Fowler (Hanley) are in love and expect to marry in due course. When Jack is called up for war service however, Joan's socially-ambitious mother (Ellen Pollock) seizes the chance to meddle in her daughter's life by encouraging the attentions of Joan's older boss Adolphus Pickering (Claud Allister), who is infatuated with her.