Biggles in the Baltic

War. Major Bigglesworth is commissioned by the R.A.F. and immediately assigned to a special duty. He has to take a secret squadron to a rocky island in the Baltic, there to harry the enemy from behind their lines.

Adventures befall them with fiendish rapidity, as we expect them to happen to Biggles. Their secret hide-out is almost immediately visited by a U-boat ... they have to undertake alarming flights over enemy country, once even landing to destroy a railway tunnel ... and finally their master stroke, they succeed in capturing the German Naval Code.