Former Colonel Fernandez is appointed Minister of the National Anti-Drug Agency (SENAD) and purges the special forces to fight the first of many battles against drug trafficking on the border of Paraguay and Argentina.

When a retired Green Beret soldier is murdered by an Albanian drug gang in London, four of his veteran SAS comrades set out to avenge him, dispensing their own brand of justice on the streets of London.

制作团队表示，他们在重新阅读《哈利·波特与混血王子》时产生了一些好奇和启发，原著小说里有一段是讲述邓布利多教授带着哈利·波特，一起观看来自家养小精灵郝琪的回忆，描绘了赫普兹巴·史密斯以及收藏的赫奇帕奇和斯莱特林遗物的线索。这部自制电影就从这个点延伸出去的拓展剧情。 早在2016年时就由独立制片工作室「Tryangle Films」筹划拍摄，靠着集资网站来募款筹措资金，虽然一度被拥有《哈利波特》系列版权的片商华纳兄弟以侵犯权为由要求下架，但经过制作团队多次的沟通和协商后，华纳终于确定全面放行。

　　The story of Parker’s new effort, penned by William “Billy” Ivory, is inspired by true events and is set in the summer of 2014. On the occasion of the 70th anniversary of the D-Day landings in France, octogenarian Bernard Jordan (played by Michael Caine) made global headlines. He’d staged a “great escape” from his care home to join fellow war veterans on a beach in Normandy, commemorating their fallen comrades. The bittersweet script is said to explore “the reality with wit and a very big heart”. Bernie’s adventure, spanning just 48 hours, also marked the culmination of his 60-year marriage to Irene (Glenda Jackson). The film will also celebrate “their love without any sentimentality and with an eye to the lessons we might all learn from the Greatest Generation”.