主人公Marcella Backland是一名年近40岁的女侦探，11年前因为结婚而离开了自己热爱的警察工作。Marcella的婚姻突然终结——她的丈夫Jason突然宣称自己不再爱她并快速离开了她——女儿又躲在寄宿学校里不肯见她，她只好回到既熟悉又陌生的大都会警署命案调查组重新探索自己的人生道路。上级立刻指派她调查一系列奇怪的谋杀案，这些新案件看起来与11年前发生的、始终未能侦破的多起谋杀案相似。Marcella早在2005年就曾调查过那些谋杀案，但因为当时她的第二个孩子不幸流产，悲伤的情绪严重影响了她的办案能力。或许是当年的凶手再次现身？或许是有人模仿作案？剧情将重点探索这名单身女侦探的心理世界，尤其是她处理一起有多名潜在嫌疑人和受害人的连环谋杀案时的心理世界。她的精神世界如此脆弱，她如何能很好地完成工作？她一心扑在工作上，就能找到她想要的答案吗？或者她的精神状态将把她引入更加危险的领域？另一方面，Marcella始终怀疑丈夫离开自己另有动机，于是在工作之余做了大量调查工作。糟糕的是，她的发现可能导致她更加心碎。
编剧: Hans Rosenfeldt
播出日期: 2021-01-26
运行时间: 47 min
概述: Eighteen months later, Marcella has a new life as a deep undercover operative in Belfast, spying on a powerful family that's running a shady business.
播出日期: 2021-01-26
运行时间: 46 min
概述: Marcella is recognized on the street, and later finds an odd note on her windshield. When DCI Sangha arrives in Belfast, Bobby must cover his tracks.
编剧: Paul Waters
播出日期: 2021-02-02
运行时间: 46 min
概述: Marcella receives an anonymous package. At Jessie's vigil, DCI Sangha spots an eerily familiar face. Finn finds out who sold Jessie the heroin.
编剧: Tim Loane
播出日期: 2021-02-09
运行时间: 46 min
概述: The Maguires arrange for Bobby to leave the U.K., but the plan goes awry en route to the airport. Katherine sends a threatening message to Marcella.
编剧: Mike Walden
播出日期: 2021-02-16
运行时间: 46 min
概述: Her stalker's latest threat leaves Marcella suspicious of Frank. After recognizing one of Bobby's abductors in police records, she tracks him down.
编剧: Matthew Thomas
播出日期: 2021-02-23
运行时间: 47 min
概述: Marcella recalls how Frank rescued and reprogrammed her 18 months earlier. When Stacey flees from the Maguires with her baby, Marcella must find her.
编剧: Tim Loane
播出日期: 2021-03-02
运行时间: 43 min
概述: Finn uses Rory's phobia to bully him into an alliance. Marcella confronts Frank with a discovery about his past. DCI Sangha learns of Stacey's arrest.
编剧: David Allison
播出日期: 2021-03-02
运行时间: 45 min
概述: Marcella's latest blackout leaves her with an unexplained corpse. Wondering why DCI Sangha is still in Belfast, Jack decides to investigate on his own.
