The preservation of history in the 25th century faces a perilous threat from an ill-intentioned ruler's creation of hazardous time machines. Flint and his father are ensnared in prehistoric times and fossilized. After being unearthed, Flint is bestowed with magical powers to restore his human state, with the help of Tony and Sara. In a mission to safeguard the integrity of history, they embark on a journey through time to retrieve the time devices.