While exploring a dinosaur bone yard, Roxton disturbs an animal grave site and is punished by the guardian Oseena to be the prey in a hunt to the death.
Challenger and his team risk unleashing a supernatural killer to save Malone by holding a seance, which originally is started by Marguerite and Veronica's use of a Ouija board.
Challenger "upgrades" the adventurers balloon and the gang go on a test flight. They crash in an unforgiving land, where Malone befriends a female warrior.
Malone and Challenger get attacked by a tribe with blowpipes and darts that may cause death, and Malone ends up reliving his suppressed memories of World War 1.
Veronica goes for a walk and is drawn toward some piano music that she can hear, walking through a mist she comes out in a village 100 years in the past, where she falls in love with a 19th century musician, unaware of his obsession.
Challenger experiments with a mysterious energy source, and Challenger, Roxton and Marguerite are thrown forward in time, approximately 100 years to 2033. On their return they are joined by a young woman called Finn.
Our adventurers, are now joined by Finn from 2033. Claims of demonic possession make everyone a suspect, when a team of archaeologists are killed on the plateau.
Roxton's wartime record is exposed by a stranded enemy agent, who has also been trapped on the plateau. Plus some other secrets about Marguerite and Challenger come to light.
When the man that wants ultimate power over the plateau receives the medallion from the assassin who appeared in 'The Secret', he goes to the plateau and Veronica ends up reliving the last days she spent with her parents in various visions.
An explosion traps Marguerite and Roxton in an underground chamber, and their only hope for escape is Challenger...but the same explosion has left him with no memory of who he is or what has happened to his friends.
The plateau is threatened with destruction as the explorers encounter a baffling new phenomenon. We are left with a cliffhanger that ends the series and never returns.
