After an accident derails their exploits in Europe, the Hunters must band back together to hunt down history's most infamous Nazi, Adolf Hitler, who's hiding in South America. Meanwhile, a look to the past reveals Meyer Offerman encountering a dangerous threat that could unravel his secret and expose his true identity, with explosive reverberations for our Hunters.

In the summer of 1977, Jonah Heidelbaum's grandmother (a holocaust survivor) is murdered in her own living room. In an attempt to find her killer, Jonah is approached by Meyer Offerman, an old friend of his grandmother's, who reveals to Jonah that America has been infiltrated at all levels by renegade Nazis and it was they who were responsible for her death. Once the truth is revealed to him (as well as some surprising facts about his grandmother's life), Jonah is recruited into a secret organization determined to root out the Nazi infiltrators wherever they are.