1870s. Two young English officers, 2nd Lieutenants Drake and Millington, report for duty at a cavalry regiment in India. Soon hereafter, the widow of a regimental hero is assaulted and she identifies Lt. Millington as her assailant. In order to preserve the honour of the regiment, a clandestine, off-the-books court martial is arranged in order to try Lt. Millington. Lt. Drake acts as his defence attorney. The case seems cut-and-dried but Lt. Drake has other ideas and soon uncovers some alarming evidence.