The bullet and the ring

During the Second World War, one of the greatest dangers to Britain was the German U-boat. These marauding wolves prowled the seas, preying on Allied shipping, attempting to stop the supply of arms, of food, and the movement of troops and equipment. They were trying to bring Britain to its knees and very nearly succeeded. On their way home from Africa, Lance Corporal Bob Bould and the beautiful Liz Fearon experience at first hand the horrors of submarine warfare and find themselves drawn into the fight against this undersea menace.