"Obake no Q-Taro" centers on Q-Taro, a mischievous yet endearing ghost who emerges from a mysterious urn discovered by the young boy Sho-chan. Q-Taro, despite being a ghost, is far from frightening; he is playful, clumsy, and often more of a nuisance than a threat. The series explores his interactions with Sho-chan's family and the neighborhood, blending humor and lighthearted supernatural elements. Q-Taro's antics frequently lead to comedic situations, as he attempts to adapt to human life while inadvertently causing chaos. His ghostly abilities, such as invisibility and shape-shifting, are often used for pranks or to solve minor problems, though they rarely go as planned.

The narrative primarily unfolds in episodic format, with each episode presenting a self-contained story. Sho-chan's family, including his parents and younger sister, serve as the primary human characters, reacting to Q-Taro's presence with a mix of exasperation and affection. The family dynamic is central to the series, as Q-Taro becomes an unofficial member of the household, despite his supernatural origins. Other recurring characters include Q-Taro's ghostly friends, such as the timid Boosuke and the more serious Don Dracula, who occasionally join in his escapades. The series balances Q-Taro's ghostly nature with his desire to fit into the human world, creating a whimsical and family-friendly atmosphere. Themes of friendship, acceptance, and the blending of the supernatural with the mundane are woven throughout the narrative, making it a charming and accessible story for audiences of all ages.