To purge Benjamin of his desire to join the Army, his father, a senior British diplomat, entrusts him with a mission to Tsar Nicholas II's headquarters. On the way to Russia, Benjamin encounters Sergei Breselov, an officer in the Imperial Army, lying wounded in a field hospital. He persuades the authorities to let him escort Sergei to Petrograd, but their trip is halted when their train is attacked by deserting soldiers. Sergei and Benjamin must band together to survive and make their own way to the capitol.
The handsome Sergei Breselov stirs something in Benjamin, and to his surprise, his feelings are returned. Despite the forbidden nature of their association, their bond tightens as Sergei heals, and they are again thrust into the thick of war as the revolution rages around them, threatening to topple the Russian court forever.