When the little buses encounter Anne, a woman consumed by dinosaur mysteries, they get swept into an unexpected expedition. Anne's daughter Hana rolls her eyes at her mother's obsession, but there's no stopping the determined adventurer. Instead, Anne recruits the buses themselves as her unlikely companions, and together they venture into uncharted territory searching for evidence of dinosaurs long forgotten by the world. What starts as a whimsical treasure hunt becomes a genuine mystery. The buses must navigate treacherous landscapes, solve puzzles, and work as a team to uncover what Anne has been chasing all these years. Along the way, tensions bubble up between Hana's skepticism and her mother's unwavering belief in what lies hidden. The adventure tests friendships, challenges assumptions, and pushes the buses beyond their usual routes. This special combines exploration with humor and heart, offering young viewers a story about curiosity, family bonds, and the thrill of discovery. It's a standalone adventure that welcomes both longtime fans of the bus crew and newcomers looking for something fresh.