Four-part BBC drama series based on the novel by Robert Galbraith, aka J.K. Rowling.

In this instalment, troubled private detective Cormoran Strike (Tom Burke) is approached by a young man who claims he witnessed a murder as a child. As he investigates and discovers the man's claims may be unreliable, Strike learns of a blackmail plot involving prominent politician Jasper Chilwell (Robert Glenister).

Strike's secretary Robin Ellacott (Holliday Grainger) goes undercover to solve the case, but when Chiswell is found dead Strike and Robin are tasked with solving his murder.