表面上，雪莉（珍妮弗·加纳 Jennifer Garner 饰）是一名普通的大学研究生，实际上，她已为名为SD6的秘密情报组织工作多年。在同男友结婚之际，雪莉决定向其公开自己的真实身份，没想到男友却因此被组织的安全人员暗杀。愤怒中，雪莉选择了“罢工”，之后亦遭到了抹杀。
危机之中，雪莉知道了自己的父亲杰克（维克托·加柏 Victor Garber 饰）也是和自己一样的秘密特工，并且，在背后扶持SD6的并非国家组织，而是拥有强大武力的反动分子。于私于公，雪莉和SD6都有着不共戴天之仇，她回到了SD6，但此时，雪莉的身份已升级成了为CIA工作的双重间谍，在危险和考验之中，雪莉的任务只有一个，那就是彻底铲除SD6。
Shetland returns for a new thrilling six-part tale with Douglas Henshall reprising his role as DI Jimmy Perez alongside series favourites Alison O’Donnell, Steven Robertson, Mark Bonnar, Erin Armstrong, Anne Kidd and Lewis Howden. Series 6 centres on the doorstep murder of a prominent local figure, a case which strikes at the heart of the Shetland Isles and its people. As Perez and his team uncover a kaleidoscope of motives for the murder, their investigation soon takes a shockingly sinister turn.
Tosh suspects something is seriously wrong when her friend, Annie Bett, goes missing. Calder has no time to recover from a life-threatening ordeal of her own, as together they set out in search of Annie and her young son, Noah.
Award-winning crime writer Ann Cleeves' bestselling detective series returns for a fifth season as DI Jimmy Perez faces a compelling new single mystery. A human hand washes up on a Shetland beach. A few hours later, more body parts are discovered in a hold-all that has been dumped at sea. The victim is identified as a young Nigerian man, spotted in Lerwick a few days before. What was he doing on the islands? In investigating his murder, DI Perez becomes involved in the search for a vulnerable young woman, leading him to uncover a complex network of human trafficking across Scotland’s remote rural communities.
