After leading nuclear scientists are kidnapped and smuggled behind the Iron Curtain, an FBI man and a British agent are assigned to catch the kidnappers.After leading nuclear scientists are kidnapped and smuggled behind the Iron Curtain, an FBI man and a British agent are assigned to catch the kidnappers.After leading nuclear scientists are kidnapped and smuggled behind the Iron Curtain, an FBI man and a British agent are assigned to catch the kidnappers.