"Gaki Deka" is a comedic anime series that revolves around the misadventures of a young boy named Deka, who works as a police officer despite his age. The story is set in a fictional town where Deka, despite his small stature and childish demeanor, is determined to uphold justice and maintain order. His enthusiasm often leads to chaotic and humorous situations, as his methods are unconventional and frequently clash with the more serious and by-the-book approach of his colleagues.

Deka's partner is a seasoned officer named Oki, who serves as a foil to Deka's impulsive nature. Oki is often exasperated by Deka's antics but ultimately respects his dedication and resourcefulness. Together, they tackle a variety of cases, ranging from petty crimes to more serious incidents, though Deka's overzealousness often complicates matters. The series balances slapstick comedy with moments of genuine problem-solving, highlighting Deka's unique ability to think outside the box.

The supporting cast includes a diverse array of characters, such as the stern police chief who frequently reprimands Deka for his unorthodox methods, and a group of local children who admire Deka and occasionally assist him in his endeavors. The episodic nature of the series allows for a wide range of scenarios, from solving mysteries to dealing with everyday nuisances, all while maintaining a lighthearted tone.

Throughout the series, Deka's unwavering optimism and determination to do what he believes is right drive the narrative forward. Despite his frequent blunders, his heart is always in the right place, and his efforts often lead to positive outcomes, even if they are achieved in the most roundabout ways. The interplay between Deka's youthful exuberance and the more grounded perspectives of the adult characters creates a dynamic that is both entertaining and endearing.