"Final Fantasy: Legend of the Crystals" is a four-part OVA series set 200 years after the events of the original "Final Fantasy" video game. The story revolves around the struggle to protect the world from the resurgence of an ancient evil tied to the power of the Crystals, which maintain balance in the universe. The narrative begins with the theft of the Wind Crystal by a mysterious air pirate named Rouge, who seeks to harness its power for his own ambitions. This act disrupts the natural order, threatening the world with chaos.

The protagonist, Linaly, is a young girl from the village of Kolina, descended from the legendary hero who saved the world centuries earlier. Linaly possesses a unique connection to the Crystals, marked by a mysterious tattoo on her back. When her village is attacked by Rouge and his forces, she is rescued by a wandering adventurer named Prettz, who becomes her companion. Together, they embark on a journey to recover the stolen Wind Crystal and prevent further calamity.

As the story progresses, Linaly and Prettz encounter Valkus, a warrior from the sky city of Dahaz, who joins their quest. The group learns that Rouge is working for a far greater threat: the resurrected sorcerer Ra Devil, who seeks to use the Crystals to awaken the destructive power of the Deathgyunos, a massive warship capable of unleashing devastation upon the world. The heroes must confront Rouge, Ra Devil, and their minions while uncovering the deeper connection between Linaly and the Crystals.

The series explores themes of legacy, sacrifice, and the enduring struggle between light and darkness. Linaly’s journey is central to the narrative, as she grapples with her destiny and the weight of her ancestors’ legacy. The story culminates in a climactic battle against Ra Devil and the Deathgyunos, with the fate of the world hanging in the balance. Through courage and unity, the heroes strive to restore harmony and ensure the Crystals’ power is used for the preservation of life rather than destruction.