In the year 1501, a tumultuous coup d’état wreaks havoc in an Italian city, leaving its rightful ruler, Arnolfini, powerless as he is away. In a desperate bid to reclaim the city, Arnolfini entices a group of mercenaries with a tempting promise of twenty-four hours of unchecked looting if they can successfully restore him to power. However, as chaos ensues, with atrocities of rape and murder breaking out among the populace, Arnolfini soon decides that his unwelcome allies must be removed.

Among the mercenaries, the noble leader, Hawkwood, finds himself grappling with the moral consequences of war when he inadvertently injures a young nun during the siege. In an act of compassion, he resolves to care for her, convinced that her health must be restored. Arnolfini agrees to procure medical help for the nun, which leads Hawkwood to turn against his former lieutenant, Martin. He commands Arnolfini’s cavalry to oust the mercenaries from the city, ultimately depriving them of their spoils. Tragedy strikes for Martin when his son is born still, and while laying the infant to rest, he uncovers a wooden statue of Saint Martin of Tours—a sign from the heavens, it seems, compelling the mercenaries’ cardinal to announce Martin as their new leader.

Meanwhile, Arnolfini’s son, Steven, finds himself betrothed to the enchanting Agnes. Their initial meeting is a scene straight out of a fairytale, as they share a mystical mandrake that forces them to fall in love instantly. Yet, their romantic moment is abruptly shattered when Martin’s band attacks their entourage, spiriting Agnes away alongside her opulent dowry. In the melee, Arnolfini suffers grave injuries, and the poor lady-in-waiting, Kathleen, is brutally killed. Once at the mercy of Martin and his men, Agnes tries to employ her charms to gain Martin’s favor, only to become a victim of brutal violation.

The mercenaries subsequently lay siege to a castle inhabited by unsuspecting plague-ridden locals. Utilizing Agnes’s influence, Martin captures the castle effortlessly, while she feigns disinterest in her former life—not knowing that Steven is relentless in his quest to save her. His desperation leads him to enlist Hawkwood’s help, although Hawkwood harbors a desire for a peaceful life with the very nun he had cared for. As Steven adopts his father’s ruthlessness, he forcefully takes Hawkwood’s companion to ensure his cooperation in his rescue mission.

The siege intensifies as Steven attempts to breach the castle walls, but the cunning Martin is one step ahead, using gunpowder to thwart Steven’s siege tower. In a dangerous turn of events, Steven is captured and shackled, exposed to the scorn of the mercenaries as Agnes pretends to be complicit in the degradation of her would-be savior. However, in a twist of fate, Hawkwood manages to cure Steven of the plague using innovative medical techniques learned from a dying patient. With the urgency of the siege escalating, he resorts to catapulting infected animal remains into the castle, intending to spread the sickness among Martin’s forces.

Amidst the chaos, Agnes watches as the mercenaries earnestly consume the tainted water. When Martin prepares to quench his thirst, she heroically slaps the cup from his hands, instigating a wave of sickness that soon decimates Martin’s brigands. They cast him into the very well that had become synonymous with their treachery. As Hawkwood and Arnolfini regain their strength and lead an army back to finish what they started, an unexpected alliance develops between Martin and Steven, as both require the other’s strengths for their escape.

In a cinematic climax, as fire engulfs the castle, Martin and Agnes engage in a deadly dance of power and desire. She confesses her love for him, but he, in a moment of rage, resolves to end her life to prevent her from reuniting with Steven. In a desperate attempt to save his love, Steven intervenes, leading to a brutal confrontation between the two men. But as the flames rise around them, Agnes strikes a final blow, enabling her and Steven to flee the conflagration of their past lives as they escape into an uncertain future—while Martin watches, a sack of stolen wealth clutched tightly in his grasp, slipping away into the night.

This tumultuous tale weaves a rich narrative of betrayal, desire, and survival, encapsulating the harrowing consequences of ambition and love amidst the backdrop of a crumbling world.