The Kree revolutionary Dar-Benn uncovers one of the ancient Quantum Bands on a distant planet. Seeking to restore the dying Kree homeworld of Hala after years of environmental collapse and civil unrest, Dar-Benn combines the Band with the Kree Universal Weapon, granting herself extraordinary cosmic power. However, activating the artifact destabilizes the network of Jump Points that connects the galaxy for interstellar travel, creating dangerous distortions across space. These anomalies begin spreading rapidly, threatening entire systems and drawing the attention of multiple heroes across the universe.

Near Earth, Nick Fury oversees operations aboard the S.A.B.E.R. Space Station when scientists detect severe disruptions near one of the Jump Points. Monica Rambeau is sent to investigate the anomaly while Carol Danvers independently pursues another disturbance connected to Kree activity. At the same time on Earth, teenage superhero Kamala Khan spends her days idolizing Captain Marvel while balancing her normal family life in Jersey City. When all three women simultaneously interact with the unstable Jump Point energy through their light-based powers, they become quantum entangled, causing them to unpredictably switch places whenever they use their abilities.

The sudden entanglement creates chaos during a Kree attack, with Carol, Monica, and Kamala constantly teleporting into each other’s battles across space and Earth. Despite their confusion, they manage to fend off Dar-Benn’s forces, though the conflict severely damages the Khan family home and exposes Kamala’s superhero activities to greater danger. After returning everyone to their original locations, Fury and Monica visit Kamala and her family to explain the bizarre cosmic phenomenon. Monica theorizes that their powers have become linked at a quantum level, meaning any simultaneous use of energy-based abilities triggers an involuntary swap between them.

As the instability worsens, Carol tracks Dar-Benn to Tarnax IV, a Skrull refugee colony established after the destruction of the Skrull homeworld. Carol had once promised to help the Skrulls find safety, making Tarnax one of the few stable homes they possess. Monica and Kamala join her there as delicate peace negotiations unfold between the Skrulls and local leadership. However, Dar-Benn arrives and violently tears open another Jump Point above the colony, siphoning away Tarnax’s atmosphere to replenish Hala’s dying environment. The colony falls into chaos as the Marvels struggle to evacuate civilians while adapting to their unpredictable power-switching during combat.

After escaping Tarnax, the three heroes begin working together aboard Fury’s station, slowly learning how to coordinate their entangled abilities. Kamala enthusiastically names the trio “The Marvels,” while Monica and Carol continue navigating unresolved emotional tension stemming from Carol’s long absence from Monica’s life after the death of Maria Rambeau. Through training and repeated battles, the team gradually masters the mechanics of their switching, allowing them to fight with increasing synchronization and efficiency. Kamala’s optimism and admiration for Carol begin softening the strained relationship between the older heroes.

Carol eventually reveals the deeper truth behind Dar-Benn’s hatred. Years earlier, Carol destroyed the Supreme Intelligence that ruled the Kree Empire, believing she was liberating the Kree people from oppression. Instead, Hala descended into ecological collapse and civil war, leaving countless Kree blaming Carol for their suffering. Dar-Benn now seeks revenge while attempting to restore Hala by stealing vital planetary resources from worlds connected to Carol’s past. The Quantum Bands, originally tied to the creation of the Jump Point network itself, amplify this danger by destabilizing space-time whenever Dar-Benn uses them recklessly.

The Marvels trace Dar-Benn’s next target to Aladna, a vibrant water-rich world culturally tied to Carol through diplomatic alliances. Arriving ahead of the Kree forces, the trio warns the planet’s leaders of the impending attack. Despite their efforts, Dar-Benn invades the planet and begins draining its oceans to replenish Hala’s water supply. During the confrontation, she nearly steals Kamala’s Quantum Band, forcing the heroes into a difficult retreat. The failure sparks tension among the team, with Kamala frustrated by Carol’s secrecy and Monica angered by Carol’s tendency to shoulder responsibility alone. Eventually, they reconcile and realize Dar-Benn’s final target will be Earth’s sun itself.

The Marvels intercept Dar-Benn before she can fully drain the sun’s energy, leading to a massive battle in orbit. Working together seamlessly for the first time, Carol, Monica, and Kamala overpower Dar-Benn and prevent her from completing her plan. Desperate and unstable, Dar-Benn attempts to use both Quantum Bands simultaneously to repair the damage she caused to the Jump Point network. Instead, the overwhelming power tears open a catastrophic rupture between realities. The energy overload destroys Dar-Benn and finally breaks the quantum entanglement linking the three heroes, but the dimensional rift continues expanding uncontrollably.

Realizing the rupture could destabilize the multiverse itself, Monica volunteers to seal it from the opposite side. Empowered by Carol and Kamala combining their abilities with hers, Monica successfully closes the breach but becomes trapped in another universe in the process. Back in her own reality, Carol travels to Hala and reignites the planet’s dying sun, finally beginning to repair the damage she unintentionally caused years earlier. Kamala returns home inspired by her experiences and begins recruiting young heroes for a new team, starting with Kate Bishop. Meanwhile, Monica awakens in an alternate universe where she encounters Binary, a variant of her mother Maria Rambeau, alongside the mutant scientist Beast, hinting at the growing collision between realities.