In this reimagined version of Final Fantasy: The Spirits Within, the story maintains its core plot but introduces elements of the beloved game series, including Warriors of Light, black, blue, and white mages, and powerful summons like Shiva and Shinryu. The film follows Aki Ross, whose haunting visions are tied to the mysterious Phantom Planet. She soon learns that a part of this planet crashed into another world inhabited by the Warriors of Light and gifted mages. These warriors and mages have used their newfound magic to prevent the Phantoms from destroying their world and have been sending messages to Aki through her visions. In this version most of the alien inhabatants in Aki's vision of the battles were summons, turned into bioweapons, the inhabatants were exploiting the lifestream of their world, it's spirit, as a source of energy, and eventually harnessed into weapons. As the story progresses, the mages help Aki and her team realize the Phantoms’ true nature as the spirits of a lost alien race. With this knowledge and the support of the other world’s inhabitants, they work to put these restless souls to rest. In the climactic final act, the Warriors of Light and mages from the other world transmit the alien particles containing the eighth spirit to Aki. As in the original film, she and Gray combine it with the other seven spirits while the antagonist, Hein, destroys the Zeus cannon and himself through his stubborn actions. Gray sacrifices himself as a conduit to transmit the completed spirit into the alien Gaia in an emotional and dramatic moment. The Earth’s Gaia returns to normal, and the Phantoms ascend into space, finally at peace. As Aki is pulled from the crater, clutching Gray’s body, the Warriors of Light and mages from the other world send psychic messages thanking her for her support. To Aki’s shock, they reveal themselves to be humans. The film closes with Aki, heartened by the collaboration between worlds, gazing across the newly liberated Earth.
