The cinematic adventure unfolds in the harsh terrain of The New World, where a skilled group of hunters, led by Boran Jing, embarks on a perilous journey across the blazing desert sands. Their ship unwittingly rouses the fearsome Diablos, a monstrous entity lurking in the dunes. The chaos that follows results in numerous casualties as the beast wreaks havoc on their vessel, leading to the fall of one solitary hunter, Boran Jing, into the vast desert below.
In a parallel realm, Captain Natalie Artemis, portrayed by Milla Jovovich, gathers a formidable squad of elite soldiers, including Dash (Meagan Good), Link (Tip "T.I." Harris), Marshall (Diego Boneta), Steeler (Josh Helman), and Ax (Jin Au-Yeung). They are tasked with a mission in the desert that soon reveals a series of enigmatic markers. Activating these markers unleashes a devastating storm, causing the ground to crumble and forcing the team down a perilous crevice.
As they awaken, the remaining members of the team are met with the grim sight of their fallen comrades, victims of a force that dwarfs any human technology. Under Artemis's leadership, they mount a desperate attempt to escape the relentless landscape. Their journey takes a treacherous turn when they encounter what they initially believe to be a massive ribcage, only to discover it harbors the domain of the Diablos.
From a distance, Boran Jing, the hunter, tries to warn the group using an arrow marked with chalk, but his warning is mishandled as a threat. Their aggressive response prompts the Diablos to emerge from the sands, pursuing the team with relentless fury. Tragedy strikes as Ax meets a grim fate under the beast's deadly claws, and Steeler falls victim to its horn. With no other option, the survivors seek sanctuary within a nearby cave.
Just as they think they are safe, night brings forth an even greater horror: the Nerscylla, a horde of cave-dwelling arachnids. Marshall becomes a meal for one of these creatures while Artemis finds herself knocked out and awakening in a chilling web-pod produced by the Nerscylla. In a harrowing scene, she discovers Dash's lifeless body beside her while a hatching monster begins to charge at the gravely injured Link. In a frantic escape, Artemis is propelled into the blinding daylight, a weakness for the Nerscylla, and prepares to face the threats that lie ahead.
The tension escalates during a standoff between Artemis and the hunter, both perceiving each other as potential threats. Engagement ensues, resulting in Artemis's capture as Boran Jing takes her to his cave, wary of the approaching Nerscylla. His calculated denial of sustenance merely strengthens her resolve to break free from captivity. Their conflict eventually draws in more Nerscylla, prompting an unexpected ceasefire where Artemis shares chocolate from her supplies with the hunter. In turn, he offers her water, hinting at the budding understanding between them.
Navigating their uncertain alliance, Artemis confides in the hunter about her aim to return home through the rift that transported her to this world, but a formidable adversary stands in her way: the Diablos. The two concoct a daring strategy, suggesting that they use the Nerscylla's venom against their enemies. Gradually, the hunter teaches her how to wield his deadly weapons, ultimately capturing a Nerscylla to extract its venom before they retreat to the relative safety of his cave.
In a moment of camaraderie, Artemis imparts elements of her language to the hunter, who shares tales of his lost loved ones symbolized by two small figures he carries. This meaningful exchange underscores the resilience of connection amidst dire scenarios.
The following day, Artemis and the hunter embark on their intense mission against the Diablos, crafting clever tactics to lure the creature to an abandoned shipwreck. They unleash arrows imbued with Nerscylla venom, while taking turns to strike the fatal blow. The Diablos eventually unbalances the hunter, but Artemis seizes her opportunity, climbing atop the beast and driving her sword into its skull until it finally succumbs to their efforts.
Following their hard-fought victory, Artemis rushes to aid the injured hunter, reviving him with her resourcefulness. Their bond strengthens as they press onward through the uncertainties awaiting them. Together, they traverse deeper into a realm filled with extraordinary creatures, discovering a hopeful beacon: the Sky Tower, which offers a path back to Artemis's world. After gathering supplies and establishing camp, their peace is disrupted by a colossal threat—the Rathalos, a massive beast intent on destruction.
Just as despair threatens to overwhelm them, Artemis's former crew, under the guidance of the enigmatic Admiral (Wallace Chung), descends to combat the chaos and rescue her. However, an unexpected betrayal from the Admiral leaves Artemis vulnerable, as he confines her in a prison-like enclosure with her former allies, including a humorous feline chef known as Felyne. The Admiral reveals his true agenda: safeguarding his realm from interdimensional dangers, educating Artemis about Rathalos’s formidable powers.
United, they prepare for a joint confrontation against the Rathalos. As ardent warriors, Artemis fights alongside the Admiral’s team. When the beast retaliates, a chance presents itself for Artemis to make a daring escape, catapulting herself back into her native world. Yet, her triumph is short-lived as the Rathalos chases her, leaving devastation in its wake.
Armed with a crossbow and explosives, Artemis readies herself for a decisive showdown with the creature. In a moment of precision, she triggers an explosive device during a critical moment, weakening the beast. The hunter then delivers a volley of explosive arrows, sealing the Rathalos's fate.
As the aftermath unfolds, the Admiral appears, forewarning of yet another powerful adversary on the horizon. Unshaken by her recent experiences, Artemis stands resolute alongside her new allies, ready to confront the imminent challenge. Their readiness underscores a fierce bond forged in the heat of battle.
In the credits, Artemis finds herself back in The New World, now accompanied by the hunter and the Admiral as they face a new towering beast, all while a mysterious hooded figure watches their every move. The ever-loyal Felyne sticks by, ready to lend a shoulder of support as they prepare for the impending confrontation.
