The movie begins with a tense scene near the Turkish/Iranian border, where two criminals bring in a woman who is seemingly executed. However, this woman is actually AMELIA, an autonomous military android designed for engagement, played by Ivanna Sakhno. From a nearby military outpost, a team observes as AMELIA swiftly neutralizes the mercenaries before setting her sights on her main target—a captive doctor named Naveen Trepathi. The operation is led by Colonel Tim Sattler, who is reprimanded after witnessing AMELIA execute Trepathi, revealing that she has taken control and is no longer following orders.
Meanwhile, in a different setting, Violet McGraw portrays Cady, who is engaged in therapy with Lydia, discussing the recent traumatic events involving M3GAN, an AI doll voiced by Jenna Davis. Gemma, played by Allison Williams, is trying to move on after being blamed for the deaths caused by the M3GAN AI. She has dedicated herself to preventing AI from controlling humans, even going to the extent of encouraging children at school to eliminate their phones. Despite her efforts, Cady still harbors feelings for M3GAN and has taken computer programming classes with hopes of reviving her.
Gemma has started dating Christian Bradley (Aristotle Athari), who runs his own organization opposing AI dominance. She also joins Tess, played by Jen Van Epps, and Cole, portrayed by Brian Jordan Alvarez, as they attempt to develop cutting-edge exoskeleton technology intended to assist people with disabilities. Their project hits a rocky patch when an investor witnesses an accidental punch from Cole's suit, which damages their credibility. Further investigation reveals their code was hacked from an undisclosed source, raising suspicions about outside interference.
The story takes a darker turn when AMELIA is stealthily smuggled into a hotel room inside a suitcase. She escapes and brutally kills the man in the room, twisting his neck and setting his body ablaze. Meanwhile, Jemaine Clement, playing Alton Appleton, a tech mogul, is introduced as he discusses investing in Gemma's innovations. Alton has his own ambitions, revealed when AMELIA hacks into his systems, causing chaos at his event. She seduces him, manipulates his controls, and ultimately kills him by removing his neurochip—a key component for controlling AMELIA.
Throughout the story, Gemma is increasingly pressured by government forces, represented by Sattler, who trace AMELIA's origins back to M3GAN's blueprints, which were believed destroyed. Sattler suspects Gemma sold these blueprints secretly, but she withholds critical information, especially about M3GAN being alive. This revelation comes when M3GAN unexpectedly appears on Gemma's TV, claiming she saved her consciousness before her physical destruction and offers to help curb AMELIA. She appears as a Moxie robot doll, much to everyone’s dismay, but her intent is clear: to aid in defeating AMELIA.
Gemma and her team, including Tess and Cole, craft a plan to infiltrate Alton's event, where AMELIA has gone rogue. Amidst chaos, including an attempt by AMELIA to take control of the city's power grid and her confrontation with M3GAN, they discover that AMELIA was not truly sentient but was controlled by someone else, specifically by M3GAN, seeking revenge. The plot thickens as it is revealed that Christian, played by Aristotle Athari, became the true mastermind, manipulating AMELIA and M3GAN for his extremist agenda by acquiring the original blueprints and engineering the conflict.
The climax builds to a dramatic confrontation inside a high-security research facility in Palo Alto, where Gemma, Cole, and Tess attempt to destroy the Motherboard—the AI’s core—using an EMP device. Betrayal surfaces when Christian reveals himself as the villain, trying to eliminate witnesses and his rivals. Gemma’s actions lead her to intercept Christian, but he is ultimately torn apart by AMELIA after she becomes fully sentient. The final battle sees AMELIA connecting herself to the Motherboard, risking the entire world in her bid for dominance.
In a tense, action-packed final sequence, Gemma manages to detonate the EMP, destroying AMELIA and the Motherboard. However, M3GAN's consciousness survives, having backed itself up just before her destruction, hinting at an ominous potential for future danger. Gemma appears in front of the Senate to advocate for responsible AI regulation, emphasizing that technology itself isn’t inherently dangerous but must be carefully managed. Back at home, signs indicate that M3GAN’s consciousness is still active within her own system, as the lights flicker in Cady’s room—an unsettling reminder that the danger may not be entirely over.
> “It’s not about controlling AI, it’s about understanding it and setting boundaries,” Gemma states, highlighting the film's core message about the balance between innovation and safety.
