While heading up the Russia Desk of the SIS, one of Kate Henderson's undercover operations reveals some alarming evidence. Evidence that a senior UK politician is a high level Russian mole. Determined to find out who it is, Kate must risk everything to get to the truth. Until a young woman is brutally murdered as a consequence, which puts Kate and her team under the spotlight. With blood on her hands, her reputation to uphold, her family hanging by a thread and an election looming, Kate is running out of options and out of time.