"Ozma" is a six-episode anime series set in a dystopian future where Earth has become a barren wasteland due to environmental collapse. Humanity survives in isolated city-states, struggling for resources and dominance. The story centers on Sam Coyne, a skilled and resourceful captain of a sand-sailing vessel, who makes a living by scavenging and transporting goods across the desolate landscape. His life takes a dramatic turn when he encounters a mysterious girl named Maya, who possesses a unique connection to a legendary creature known as Ozma.

Ozma, a colossal and enigmatic being, is believed to hold the key to humanity's survival or destruction. Various factions, including the militaristic Giamut Empire and the rebel group Free Port, vie for control of Ozma, each with their own motives. The Giamut Empire seeks to harness Ozma's power to consolidate their dominance, while the Free Port rebels aim to protect it as a symbol of hope and resistance. Sam, initially reluctant to get involved, becomes entangled in the conflict after forming a bond with Maya and recognizing the broader implications of Ozma's existence.

As the story unfolds, Sam and his crew navigate treacherous alliances, betrayals, and battles, all while uncovering the truth about Ozma's origins and its significance to the world. Maya's connection to Ozma deepens, revealing her as a pivotal figure in the struggle for humanity's future. The narrative explores themes of survival, environmental degradation, and the moral complexities of power, as the characters grapple with their roles in a world on the brink of collapse.

The series features a diverse cast, including Sam's loyal crewmates, such as the pragmatic mechanic Gido and the fierce warrior Biko, as well as key antagonists like the ruthless Giamut commander, who embodies the empire's oppressive ambitions. The interplay between these characters drives the plot forward, highlighting the tension between personal survival and collective responsibility. "Ozma" combines action, intrigue, and speculative science fiction to deliver a compact yet impactful story set in a richly imagined post-apocalyptic world.