二次世界大战，希特勒妄图入侵英国本土，摧毁英国研发的雷达系统和空军基地指挥部。英军陆军上尉保尔（弗雷德里克·斯塔福德 Frederick Stafford饰）发现德国特工可能冒充英国士兵潜入英国，因此奉命搜捕这群德国特工。与此同时，德国特工人员已在克鲁格（路易吉·皮斯特李 Luigi Pistilli饰）的率领下，在英国展开了秘密活动。 　　《伦敦上空的鹰》以二次世界大战为时代背景，故事则以真实事件为原型，用记录戏剧的风格描写了德国纳粹在1940年空袭英国本土，致使英国损失惨重的战争故事。本片由上海电影译制厂配音，童自荣、毕可、乔臻、丁建华等知名配音演员倾情献声。

Umberto Lenzi is undoubtedly the king of Italian crime movies, but unfortunately; Syndicate Sadists is not the best examples of his work in this genre. Lenzi's crime flicks tend to be a cut above the rest because he makes films based on stories with a point, and they don't lack direction; but this film feels a bit too wayward to fully fit with the rest of his stuff. The film takes obvious influence from Sergio Leone's landmark western 'A Fistful of Dollars' (which in turn, took influence from Akira Kurosawa's landmark samurai flick Yojimbo), in that it features two warring families and a strong character at the centre. The crime that Lenzi focuses on is kidnapping, and we centre on a character called 'Rambo'. Rambo is dragged into the war between the two families after his brother is killed because of it. Rambo uses his brains and brawn to pit the two families against one another, in the hope of gaining revenge for his brother's death, rescuing a young boy that they've kidnapped, and ultimately letting the two sides destroy one another. 　　The film's biggest asset is undoubtedly Tomas Milian. Milian was put to great use by Lenzi in almost all of his crime thrillers. The range of characters he has played for Lenzi is immense, and this one is easily one of the coolest. The character is called Rambo, which immediately sprang to mind the popular Sylvester Stallone character - but for once, the Italians actually haven't stolen this name as Syndicate Sadists was released first! As usual, the film is wickedly entertaining, as we get to watch Milian get himself involved in the usual array of car chases, shootouts and brawls. Lenzi has got him riding a motorbike this time round, and every scene featuring it and Milian is a real standout! However, the film often feels like it doesn't really have anywhere to go, and this means that the running time is stretched out more than it should be. Compared to the crime films of other Italian directors, Syndicate Sadists is more than above average; but in relation to Lenzi crime flicks such as Almost Human and The Cynic, The Rat and The Fist - it doesn't stand tall as one of Lenzi's best. Still, if you're looking for ninety minutes of testosterone fuelled mayhem - Syndicate Sadists will suffice!