"The Three-eyed One" is a manga series that revolves around Sharaku Hosuke, a seemingly ordinary boy with a mysterious third eye hidden beneath a bandage on his forehead. This third eye grants him extraordinary powers when activated, including enhanced intelligence, psychic abilities, and access to ancient knowledge. Sharaku is the last descendant of the Three-Eyed Tribe, an ancient and advanced civilization that once thrived but has since vanished. The story explores his journey to uncover the secrets of his lineage while facing adversaries who seek to exploit his powers for their own gain.

Sharaku's life takes a dramatic turn when he encounters Professor Sharaku, his adoptive father and a brilliant archaeologist, who has been researching the Three-Eyed Tribe. The professor's work attracts the attention of various factions, including a secretive organization led by the enigmatic Chizuko, who seeks to harness the tribe's knowledge for world domination. As Sharaku delves deeper into his heritage, he discovers that the Three-Eyed Tribe's legacy is tied to a powerful artifact known as the "Stone of Destiny," which holds the key to unimaginable power.

Throughout the series, Sharaku is accompanied by a diverse cast of characters, including his loyal friend and protector, Hoi Hoi, a small, bird-like creature with a fierce sense of duty. Together, they navigate a world filled with ancient ruins, supernatural phenomena, and dangerous adversaries. Sharaku's dual nature—his innocent, childlike demeanor when his third eye is sealed and his cold, calculating personality when it is revealed—adds complexity to his character and drives much of the narrative tension.

The plot is structured around episodic adventures, with each arc focusing on Sharaku's encounters with new enemies, allies, and ancient mysteries. These adventures often involve deciphering cryptic clues, battling powerful foes, and uncovering the truth about the Three-Eyed Tribe's downfall. The series blends elements of science fiction, fantasy, and adventure, with a strong emphasis on exploration and discovery.

As the story progresses, Sharaku's understanding of his powers and his role in the world deepens. He learns to balance his humanity with the immense responsibility that comes with his abilities, all while striving to protect the world from those who would misuse the tribe's knowledge. The series culminates in a climactic confrontation that tests Sharaku's resolve and forces him to confront the ultimate fate of the Three-Eyed Tribe and his own destiny.