10 years after Martin Shaw turned the beloved Inspector Gently novels into a hit BBC One TV series, filming has begun on two final feature-length episodes. Back in action one last time will be Shaw as the eponymous inspector, who is tested like never before just as he winds down his career. In the first of two films - Gently Liberated - the inspector and his trusted allies Bacchus (Lee Ingleby) and Coles (Lisa McGrillis) are brought in to investigate a possible "miscarriage of justice". However, their final case in Gently and the New Age has the Met's new Special Investigations Squad boss Lister bringing in the inspector to investigate high levels of corruption within the force. Both of these mini-movies will be set in 1970, as the women's liberation movement and the rise of the Conservative Party bring clashing values to Britain.
该剧改编自横关大的小说，主人公是从性格、价值观到办案方针都截然不同的两名同父异母的刑警，他们将面对在池袋发生的凶恶案件。
福家警部补（檀丽 饰）是搜查一课强行犯十三系系长石松和夫（稻垣吾郎 饰）麾下的刑警，她打扮普通老土，看起来总是一副迷迷糊糊颠三倒四的模样，但是却有着极强的推理分析能力，和一旦抓住线索便死咬住绝不松口的劲头，以致于石松系长和许多同僚都对她唯恐避之不及。许多时候，得不到援手的福家只能独自展开调查，而此时鉴定科的二冈友成（柄本时生 饰）便成为鞍前马后为她收集资料和证物的忠犬。为了掩饰罪行，罪犯们用尽各种办法制造假象和不在场证明，试图逃脱法律的制裁。而在此之前，他们不得不面对福家警部补这个难缠的对手…… 本片根据大仓崇裕的同名推理小说系列改编。
