Country girl Florence Brown (Carmel Myers) keeps the secret of her invention, an invisible deep-sea light, in a brass box which is being sought by agents of many governments, and they threaten her life at every turn. Both she and her invention would have been lost but for the unintended intervention of Vance McPhee (William Russel), a woman-chasing author who leaves the big city and goes to the country for rest, peace, and quiet for his frayed nerves--and falls in love with Florence and that finds his doctor was right when he advised McPhee that what he really needed was a wife and he could wave goodbye to the girls.