At the beginning of the 20th century, the famous Professor Challenger makes an amazing discovery - on a remote plateau in the Amazon jungle, there is an amazing and beautiful world in which dinosaurs still live. Millions of years of evolution did not touch it - it remained in its original form.
To convince the skeptics, a group of adventurers - Challenger himself, his eccentric colleague, a wealthy heiress, a fearless hunter, and a young reporter - embark on an exciting, dangerous journey in search of this amazing prehistoric world.