高级督察Amy Silva（Suranne Jones饰）和警督Kirsten Longacre（Rose Leslie饰）再度携手侦破新案，此次她们被派往偏远的北极研究站，一名英国秘密特种部队成员在此遭枪击身亡。 　　在极地气候变化引发的能源资源争夺战背景下，Amy和Kirsten必须抓住凶手，并化解一场潜在的国际冲突，而她们的职业生涯和感情关系都将面临考验。

Adapted from Tom Bradby’s tense, topical novel of the same title, SecretService, is a suspenseful, fresh-from-the-headlines story deeplyrooted in today’s political landscape. It delves into the long-standing tensions between Russia and the UK, and asks how far can Russian interference in British politics really go?Secret Service follows senior MI6 officer, Kate Henderson, whose life must seem pretty ordinary to those who don’t know her well, as she’s happily married with two teenagers and a job in the civil service.However, Kate’s real job is heading up the Russia Desk of the Secret Intelligence Service. When her undercover operations reveal alarming evidence that a senior UK politician is possibly a high-level Russian asset, Kate is in a race against time to uncover their identity.Then a young woman is brutally murdered, throwing Kate and her team into the spotlight. With blood on her hands, her reputation to uphold, her family hanging by a thread, and an election looming, Kate is quickly running out of options and the clock is ticking….