Eastbound presents a compelling narrative set on board the Trans-Siberian Railway, focusing on themes of flight, moral conflict, and human connection. The protagonist, Aliocha, is a 20-year-old Russian soldier en route to a remote military post for mandatory military service. Confronted with the grim realities of enlisting and the prospect of violent initiation rituals, Aliocha becomes desperate to desert the mission. His initial attempt to escape proves unsuccessful.
During the journey, Aliocha encounters Hélène, a 35-year-old French national traveling in a higher-class carriage. She, too, is fleeing a burdensome past, seeking distance from a deteriorating relationship. Despite a significant language barrier, the two develop a mutual understanding. Aliocha appeals to Hélène for assistance, requesting her aid in concealing him from military authorities aboard the train.
Moved by his desperation, Hélène agrees to shelter him within her compartment, initiating a perilous alliance. As the train moves steadily toward the military post, the pair must navigate the constant risk of exposure. The narrative unfolds with mounting tension, portraying the psychological strain of evasion and the complexities of trust formed under duress.