A shocking assassination in the heart of London. In a bizarre mix of high-stakes global politics and radioactive villainy, a man pays with his life.

At this time of global crises and a looming new Cold War, A Very Expensive Poison sends us careering through the shadowy world of international espionage from Moscow to Mayfair.

过气明星苏西·派克斯（Suzie Pikles，比莉·派珀 饰）的手机被黑客入侵，对她来说极为不妙的图片被公诸于世。一旦生活的假面具被摘走，人是否能在“被彻底扒干净”的状态下存活？
本剧聚焦苏西与她最好的朋友和经纪人娜奥米（Naomi，Farzad 饰）试图将生活导回正轨的艰辛历程，她想要保持事业继续发展，而与丈夫柯布（Cob，Ings 饰）的婚姻开始变得岌岌可危。