In the charming city of Strasbourg in 1800, tensions escalate dramatically when Lieutenant Gabriel Feraud, a fervent Bonapartist and passionate duelist, nearly kills the Mayor's nephew during a fierce duel. The fallout from this dangerous incident forces Mayor Brigadier-General Treillard to intervene, ordering Lieutenant Armand d'Hubert, of the 3rd Hussars, to place Feraud under house arrest. However, Feraud perceives this command as a personal slight and promptly challenges d'Hubert to a duel, which ends abruptly as Feraud loses consciousness before a clear resolution can be reached.
This initial clash serves as a catalyst for a series of tumultuous events. The chaos of war provides a brief pause in their rivalry, but six months later, Feraud once again confronts d'Hubert, leading to a duel that leaves d'Hubert gravely injured. As d'Hubert recuperates, he focuses on honing his fencing skills, only to face Feraud once more in a subsequent duel. This encounter spirals into a savage wrestling match, ultimately interrupted by outside intervention, illustrating the fierce animosity boiling between the two men.
With d'Hubert’s promotion to captain offering a sliver of hope—given that military protocol forbids dueling between officers of differing ranks—he is dispatched to Lübeck, where he is taken aback to find that Feraud has also risen in rank to captain. Just weeks ahead of d'Hubert’s expected promotion to major, he attempts to slip away unnoticed but is thwarted by Feraud’s timely challenge. During this confrontation, d'Hubert’s former lover, Laura, cautions him against the fatalistic path of dueling, foreboding his inevitable demise.
Despite her warnings, the duel ensues, and d'Hubert ultimately triumphs, wounding Feraud and forcing him to concede defeat. Elated, d'Hubert prepares to leave the field, but soon learns that Feraud's regiment is being sent to Spain while he remains in Northern Europe, trapped in a perpetual cycle of vendettas and violence.
As the French Army retreats from Moscow, d'Hubert and Feraud, now both colonels, unintentionally reunite amid the chaos of war. Initially distrustful, they must set aside their rivalry to collaborate in a desperate attempt to reconnect with their forces. The tension escalates when Feraud seeks volunteers to track down Russian Cossacks, with d'Hubert being the sole officer to join him. Their mission quickly turns perilous as they fall under attack. With quick reflexes, Feraud dispatches one foe, while d'Hubert skillfully defends against the others. In the aftermath, d'Hubert wryly remarks, >“Pistols next time,” implying their conflict is far from over, and he offers Feraud a drink to celebrate their narrow escape. However, Feraud's distant demeanor speaks volumes, as he coldly accepts the gesture without a word.
Post-Napoleon's exile to Elba, d'Hubert recuperates at his sister Leonie's home where he meets the enchanting Adele. As their romance flourishes, Colonel Perteley—a devoted Bonapartist—pressures d'Hubert to rejoin the Napoleonic faction, but he remains steadfast. Feraud, upon learning of d'Hubert's refusal, labels him a traitor, his disdain palpable.
The drama escalates following Napoleon's defeat at Waterloo, leading d'Hubert to marry Adele and enlist in the service of Louis XVIII. Meanwhile, Feraud faces dire consequences for his actions during the Hundred Days war, finding himself captured and sentenced to execution. Unbeknownst to him, it is d'Hubert who intervenes, imploring the Minister of Police to spare Feraud's life. As a result, Feraud is granted parole but must live under close supervision. Meanwhile, d'Hubert and Adele look forward to welcoming their first child.
As d'Hubert's standing rises in the new French Army, a surprising challenge arrives from Feraud, demanding a pistol duel. Reluctantly adhering to the code of honor, d'Hubert accepts the duel invitation. The two warriors meet at a dilapidated château, reminiscent of their troubled past. In a startling twist, Feraud’s careless ruse allows d'Hubert an advantage. Instead of swiftly eliminating his adversary, d'Hubert seizes the moment, declaring his life is now in d'Hubert's hands, thus mandating that Feraud "conduct [himself] as a dead man," never again daring to provoke a duel.
As d'Hubert finally finds solace in a quiet life with his beloved, Feraud is confined to a lonely outpost, his life now a shadow of its former glory, consumed by a fading obsession for dueling. In starkly separate worlds, one man enjoys domestic tranquility while the other, bound by history and rivalry, endures a slow, haunting decline, echoing the fate of his once-glorious leader, caught in the relentless grasp of a bygone era.
