"Gold Throbber" is a science fiction anime series set in a dystopian future where humanity is on the brink of collapse due to a mysterious energy crisis. The story centers on a young engineer named Kaito Arisawa, who discovers a rare, self-sustaining energy source known as the "Gold Throbber." This energy source, embedded within a sentient biomechanical entity, becomes the focal point of a global conflict between powerful factions vying for control over its immense power.

Kaito, driven by a desire to protect his family and restore balance to the world, forms an uneasy alliance with the entity, which he names "Aurum." Aurum possesses advanced intelligence and the ability to manipulate energy, making it both a valuable asset and a dangerous weapon. As Kaito and Aurum navigate their partnership, they uncover the truth behind the energy crisis: a covert organization, known as the Eclipse Syndicate, has been exploiting the planet's resources to create artificial energy monopolies, destabilizing ecosystems and societies worldwide.

The narrative unfolds through a series of high-stakes missions, as Kaito and Aurum join forces with a diverse group of rebels, including a former military strategist named Rina Takahashi and a rogue hacker known as Yuto Shiraishi. Together, they work to dismantle the Eclipse Syndicate's operations while evading capture by its enforcers, led by the ruthless Commander Haruka Saito. The series explores themes of trust, sacrifice, and the ethical implications of technological advancement, as Kaito grapples with the moral dilemmas of wielding Aurum's power.

As the conflict escalates, Kaito learns that Aurum's origins are tied to an ancient civilization that once thrived on Earth, suggesting that the Gold Throbber may hold the key to humanity's survival—or its destruction. The series culminates in a climactic battle where Kaito must decide whether to use Aurum's full potential to defeat the Eclipse Syndicate, risking catastrophic consequences, or seek an alternative path to restore equilibrium. The story concludes with an open-ended resolution, leaving room for interpretation regarding the future of humanity and the role of technology in shaping it.