On a day known to the dinosaurs as "Treasure Day", Bron becomes stuck in the Mysterious Beyond. This event urges the young Longneck Littlefoot to take his friends on a quest to the Fire Mountain to save his father. Along the way, they befriend a Flyer.

Cast: Felix Avitia, Anndi McAfee, Aria Noelle Curzon, Jeff Bennett, Rob Paulsen, Barry Bostwick