苏格兰女警重新审理1995年的谋杀案。　　　　凯伦看起来就是一位平常、也不够时髦的年轻女性。她不是一个圆滑或特立独行的警察，但她的敏捷和机智令人印象深刻。25年前，十几岁的酒吧女招待罗西·达夫被刺死，三名醉酒的学生发现了她的尸体。但尽管警方怀疑，这些男孩从未受到指控。因近期一个爆火的博客提到了这起案件，凯伦被警方任命重启对这起谋杀案的调查。凯伦决心揭开那起案件隐藏一切，但这么多年过去了，现在的调查能比以前知道的更多吗？

　　After her bittersweet success in series one, Karen has been promoted to Detective Inspector and seemingly given the authority she has long been fighting for. Just as she’s getting into the swing of her powerful new role, she is assigned an infamous unsolved case that will put her under intense scrutiny; from her boss, from the media, and ultimately, from sinister forces that would rather the past stayed in the past.　　The 1984 case of Catriona and Adam Grant has confounded investigators and intrigued the public like no other. Catriona, the charming young heiress to a vast oil fortune, and her two year old son Adam, were brutally kidnapped at gunpoint outside a fish and chip shop in Fife. The ransom notes that followed stirred up an uncontrollable press storm, but when the culprits fell silent, the police faltered, and Catriona and Adam were never seen again.　　Now, a man’s body has been discovered, with indisputable links to the original kidnap. With the first piece of evidence in decades, Karen must assemble an unbeatable team alongside her sincere and lovable sidekick DC Jason ‘Mint’ and the brilliant – but romantically complicated – DS Phil Parhatka. With the international renown of the kidnap and the constant pressure from Catriona’s father, Sir Broderick Grant, the team take on the biggest challenge of their careers to date. As Karen delves deeper into what happened in the autumn of 1984, political grudges and painful secrets reveal themselves, and it soon becomes clear… the past is far from dead.

在第一季中苦乐参半的成功之后，凯伦被提升为警探，似乎获得了她长期以来一直争取的权力。就在她逐渐适应这个强大的新角色时，她被指派去处理一桩臭名昭著的悬案，这让她受到了密切关注：来自她的老板、媒体，以及最终那些希望过去就此结束的邪恶势力。