In East Germany, the American rock and roll singer Nick Rivers meets Hillary Flammond in a fancy restaurant. Hillary is a member from the resistance and her hope is to rescue her father, the scientist Dr. Paul Flammond, who is imprisoned by the Germans to develop a powerful weapon. Nick is arrested and sent to prison for helping Hillary and he meets Dr. Flammond in his laboratory. Hillary helps him to escape during a show and when he tells that he has met Dr. Flammond in the prison to Hillary, they decide to seek out the resistance leader. When they meet him, they discover that Nigel was Hillary's first lover. Further, they learn that there is a traitor in the resistance. Who might be the traitor?