Space and time are mere playthings for Dr. Joseph von Lichtenstein, and his niece, Hannah, is about to find that out the hard way. While snooping through her eccentric uncle's workshop with her two best friends, Hannah uncovers a machine that takes them on a journey through history, from the dawn of mankind to the far future. Always dreaming of the past or searching for the next big thrill, Hannah, Tracy, and Dana are in for a rough ride as they are confronted with a past they never imagined, and the next big thrill involves running for their lives.