Dan Snow explores the political intrigues and family betrayals between the Vikings, Anglo-Saxons and Normans that led to war.

A writer stumbles upon a long-hidden secret when he agrees to help former British Prime Minister Adam Lang complete his memoirs on a remote island after the politician’s assistant drowns in a mysterious accident. In director Roman Polanski’s tense drama, the author realizes that his discovery threatens some very powerful people who will do anything to ensure that certain episodes from Lang’s past remain buried.