Stirling is locked away in Hitler's most secure prison - Colditz. Leadership of the SAS passes to Paddy Mayne, a man who has built his reputation on the battlefield as a warrior of the first rank, but has no interest in charming high command. In 1943, the SAS leaves the desert for Europe, to enter a darker and far more complex theatre of war, led by a man who is often drunk and disorderly and prone to acts of savagery. They will face the terror of execution and the trauma of civilian casualties. And they will be the first to witness the nightmare of Belsen concentration camp.