But this hardly mattered to two young men whose shared love of horses brought them together and whose whole lives lay ahead of them. When war breaks out in 1914, both Jerry and Alec sign up - yet for quite different reasons.

On the fields of Flanders they find themselves standing together, but once again divided: as officer and enlisted man. And it is there, surrounded by mud and chaos and death, that one of them makes a fateful decision whose consequences will test their friendship and loyalty to breaking point.