A small brown puppy finds himself lifted off the ground and carried into the sky after becoming attached to a balloon. This unexpected event transports him far above the clouds to a wondrous realm known as the Balloon Kingdom. There, he is named Tinny, and he discovers a world populated by other animals who, like him, are born with or attached to balloons, becoming floating companions in this unique environment.

The series chronicles Tinny’s daily life and adventures within this vibrant, fantastical kingdom where animals and humans coexist. His cheerful demeanor and buoyant nature make him a beloved figure in his community as he explores his new surroundings alongside his balloon-animal friends. Together, this group of friends ventures into unfamiliar territories, leading to a variety of experiences ranging from lighthearted, humorous incidents caused by their floating abilities to more significant quests that test their courage and teamwork. A recurring focus is on the importance of friendship and community, as the characters work together to resolve conflicts, help one another, and protect their home from occasional threats.

The narrative is primarily episodic, with each self-contained story contributing to the development of the characters and their relationships. A notable narrative arc within the series involves Tinny and his friends journeying to a somewhat mysterious country of dinosaurs, expanding their world to include encounters with prehistoric creatures within the cloud-based kingdom. This particular storyline was also featured in a special movie-length installment titled Fūsen Inu Tinny: Nandaka Fushigi na - Kyouryū no Kuni. Across all his adventures, the core themes remain the excitement of discovery and the bonds formed between Tinny and his unique circle of friends in the skies.