Already reeling from bad news in the North Atlantic and the Mediterranean Sea, the British Admiralty learns that the mighty German battleship Bismarck is on the move. If she breaks out of the Baltic Sea, no British convoy is safe, even with warships on escort duty. Can the combined efforts of the Royal Navy and the RAF, along with a little luck, locate and send this menace to Britain’s lifeline to the bottom of the sea? Enter the operations room with Captain Shepherd and his staff as they seek to carry out Prime Minister Winston Churchill’s order to sink the Bismarck!