Ryohei "Hachibee" Hachiya, a determined sixth-grader, is driven by an unrelenting ambition to attain recognition. He joins forces with friends Sankichi Okuda and Shotaro Yamanaka, forming a trio dedicated to unraveling local mysteries. Together, they gather evidence and document their findings, strategically presenting discoveries to television stations in pursuit of the spotlight.

Hachibee embodies the spirited archetype of a youthful hero, sporting a signature cap and flushed cheeks. His dynamic with peers—including classmates Keiko, Yoko, and Yumiko—underscores a tight-knit camaraderie rooted in collective sleuthing. The group employs methodical tactics, blending witness interviews and suspect interrogations to solve puzzles, emphasizing collaboration and analytical resolve.