Menaced by "the strange clicking danger," Doc Savage and his fabulous five-man army take a desperate journey on a polar submarine in search of a missing ocean liner and a dazzling treasure. Their only clue is a map tattooed on the back of a blind violinist. Awaiting them at their destination is the most terrible killer the Arctic has ever known.

First published in Doc Savage Magazine # 4 June 1933 - written by Lester Dent.