英国特种空勤团创建于烽火连天的二战时期，是英国最精锐的特种部队，也是世界上第一支正规的特种作战力量。大部分现代特种战术的开创者，所有现代特种部队的楷模，以能在短时间内准确而高效的完成任务而著称。是目前所有特种部队中任务完成率最高的。战斗力极强，是一支闻名世界的老牌特种部队。本片通过机密档案、历史影像和创建成员自述，讲述SAS的成立和战斗。
The Special Air Service is the world"s most famous combat unit with the motto 『Who Dares Wins" - but the story of how it came into existence has been, until now, a closely guarded secret. Now, 75 years after it all began, the SAS has agreed to open up its archive for the first time and allow journalist and best-selling author Ben Macintyre (Operation Mincemeat, Agent Zigzag) to reveal the true story of their formation during the darkest days of World War II. With unprecedented access to the SAS secret files, unseen footage and exclusive interviews with its founding members, this series tells the remarkable story behind an extraordinary fighting force.