Thomas and Jack are surprised to see Nikki back at The Lyell, the disappearance of her friend Sally forces her to face her back after her harrowing experience in Mexico.
It tells the story of Adolfo Novak, patriarch of one of the most powerful families in the country, who gathers his family and close friends to celebrate his 80th birthday. Behind the toasts and smiles lie decades of secrets, betrayals, blind loyalties and a strong desire for revenge. The evening will end up blowing up and revealing a truth that, when finally comes to light, will be much more unexpected and surprising than any previous suspicion.
米田正子（松岛菜菜子 饰）是一名在东京国税局资料调查课任职的精英调查官，她创立了新的“复杂国税事案处理室”，专门处理连主部门都难以着手的棘手逃税案件。她招募了一群能力卓越却性格独特、不求升迁的成员，共同对付各类恶意隐匿收入的逃税者。新部门成员各有怪癖，但在米田的带领下，他们运用超强的信息搜集能力与调查技巧，将一个又一个狡猾的逃税分子逼入绝境。剧情以爽快的正邪对决为主轴，展现税务调查官如何凭专业与坚持维护社会公平，让努力纳税的人得到应有的正义。
他们在一次意外事件中相识，本以为只是彼此生命中的过客，却在不断逼近的危险与真相中，被迫站到同一阵线。当爱与责任、真相与救赎交织，他们必须在“刀刃之上”寻找各自的答案。
As Leo's replacement Thomas Chamberlain arrives Nikki investigates the murders of Rachel Freedman, shot in the head, and her little autistic son Nathan, who was poisoned. Nikki rejects policewoman Anne Burchett's theory that Rachel killed them both but is perturbed when an impostor, claiming to be Rachel's sister, visits the morgue. At the same time the disfigured corpse of Eva Liron is discovered, killed with the same poison as Nathan. She had been the nanny to French hot shot footballer Isaac Dreyfus and was planning to blackmail him over a sex tape of them both. Jewish Isaac is a controversial figure due to his anti-Muslim sentiments but he denies ant part in the murders. Then another victim, Isaac's agent Mousa, is discovered dead.
The fans have spoken. Boston Blue and Sheriff Country are at the top of their “must-watch” lists, so CBS is renewing both freshmen for the 2026-27 season.
