"Fūsen Inu Tinny: Nandaka Fushigi na Kyōryū no Kuni" centers on Tinny, a small, balloon-like dog with the ability to float. The story begins when Tinny and his friends, including a young boy named Shōta, stumble upon a mysterious portal that transports them to a prehistoric world inhabited by dinosaurs. This land, known as the Dinosaur Kingdom, is filled with both friendly and dangerous creatures, as well as remnants of an ancient civilization. The group must navigate this unfamiliar environment, encountering various challenges and forming alliances with the dinosaurs they meet.

The narrative unfolds as Tinny and his companions explore the Dinosaur Kingdom, uncovering its secrets and piecing together its history. They learn that the land is under threat from a malevolent force seeking to exploit its resources and disrupt the balance of nature. Along the way, Tinny’s unique abilities prove crucial in overcoming obstacles and aiding the dinosaurs. The group’s journey is marked by moments of adventure, discovery, and camaraderie, as they work together to protect the kingdom and find a way back to their own world.

Key characters include Tinny, whose cheerful and resourceful nature drives much of the story; Shōta, who serves as the human anchor and provides a sense of curiosity and determination; and a variety of dinosaur allies, each with distinct personalities and abilities that contribute to the group’s efforts. The series balances lighthearted moments with themes of bravery, friendship, and environmental stewardship, creating a narrative that appeals to a younger audience while maintaining a sense of wonder and excitement.