In the service of evil

Imagine that one day you receive a package with a severed leg. Intrepid Robin Ellacott, assistant to private investigator Cormoran Strike, is scared to death by this mysterious package. Her boss is used to all sorts of things, but he doesn't take this warning lightly. He remembers four people from the past who might be responsible. Together with Robin, they begin to investigate on their own and delve into the dark and twisted world of the other three suspects. However, further crimes tighten the noose around both of their necks.