故事从Kim Philby (Pearce饰)与MI6同事兼密友Nicholas Elliott (Lewis饰)的复杂关系出发，讲述了Philby这位MI6和KGB双面间谍的叛变。

本剧基于Frederick Forsyth的同名小说和1973年环球影业同名改编电影创作。

“豺狼”（埃迪·雷德梅恩 Eddie Redmayne 饰）是一个无与伦比、难以捉摸的独行杀手，他以执行高报酬的刺杀任务为生。处于“豺狼”私人生活中心的Nuria（乌苏拉·科尔维罗 Úrsula Corberó 饰）对他的身份却一无所知。在最近一次杀人后，“豺狼”遇到了自己的对手，顽强的英国情报探员Bianca（拉什纳·林奇 Lashana Lynch 饰）。Bianca开始在欧洲各地追捕“豺狼”，一场惊心动魄的猫鼠追逐战由此展开，随之而来的是一连串的破坏。

Young solicitor Nicholas Turner, plagued by financial problems, falls from the roof of his house as his wife witnesses the event through the front windows. As Barnaby and Scott investigate the possibility of foul play, Turner's neighbor and friend, Jack Wilmot mysteriously disappears. Two eccentric friends of Wilmot's, an obsessive wine snob and an unsuccessful game show host, fall under suspicion as Barnaby begins to turn up details of an elaborate fraud involving all four men. before long, DCI Barnaby has two bizarre murders on his hands amid a flurry of broken and empty wine bottles.