The Broken Chain: Blackshields: The Horus Heresy, Book 3 (Unabridged‪)‬

A Horus Heresy audio drama

Hounded by the Sons of Horus and betrayed by his second in command, Blackshield Endryd Haar must enact his riskiest gamble yet if he is to fulfil his oath to kill the traitor Warmaster Horus. 

Following on from Red Fief, it's another fascinating look at a band of Space Marines who have forsaken loyalty to either side in the Heresy, trying to forge their own destiny. 

Hounded by the Sons of Horus, legendary Blackshield Endryd Haar battles enemies from within and without his ranks. Betrayed by his second in command, Erud Vahn, Haar finds himself imprisoned and facing a slow death. Determined to escape and stay one step ahead of the traitors, Endryd must enact his riskiest gamble yet if he is to fulfil his oath to kill the Warmaster Horus. 

Running time 70 minutes. Performed by Gareth Armstrong, John Banks, Steve Conlin, Toby Longworth, Richard Reed & David Seddon