故事发生在位于加利福尼亚州的一座宁静小镇上，居民们都是抬头不见低头见的好友，彼此之间关系十分紧密。一具男孩的尸体像投入平静池塘的石块，种种迹象表明这竟然是一宗精心策划的谋杀案。一想到凶残的杀人犯就生活在自己的身边，小镇上的居民陷入了恐慌，一时间，戒备、猜忌的气氛笼罩了整个小镇。
艾莉（安娜·古恩 Anna Gunn 饰）是镇上的警官，在小镇里辛辛苦苦的工作多年，她即将获得她梦寐以求的升职，可是，这一切在一个名叫埃米特（大卫·田纳特 David Tennant 饰）的警探到来之后化作了泡影，初来乍到的埃米特不仅挤掉了艾莉成为了首席警探，艾莉还必须放成见，成为这位新上任的“老板”的助手。
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.
