A former Nazi with the nickname "the Butcher" surfaces in New York. One of his former victims tries unsuccessfully to kill him. Erskine and Colby are on the man's trail but soon encounter more, including Dryden, a wealthy man who is financing neo-Nazi groups in the U.S. The Nazi, meanwhile, is able to blend in with those he hates the most, making it especially difficult for the FBI men to catch him.
—Bill Koenig