Missions in most of the episodes were confined to the sea only and that was looking like a routine thing now so Clive Cussler and Jack Du Brul change things. This part is a mixture of several events and action takes place on land and in the sea. As compared to the stories of Corsair and The Silent Sea this is a much bigger event. There is a detailed discussion about 13th century China when some scientists started working on the creation of a big weapon.
That weapon still exists out there somewhere and whoever gets his hands on it will bring death to the land. Juan and the rest of the band travel towards Pakistan and then they are seen on the Afghanistan border for the sake of their mission.
Also, Oregon lands near the jungles of Thailand where the band has to find a woman for whom they are hired. In the beginning, the listener needs a lot of time to listen to all these fragments very carefully because it is at the end that the author joins them together. Without concentration no one can understand this story and skipping some part of the story is the biggest blunder a listener can ever make with this part. Each part is like a piece that will fit exactly into its place in the final chapter.
Thus it is not just one kind of jungle that we observe in the story, there are several sorts of crafty jungles that try to trap Juan and his band comprising of men and women. None of the team members ever lose hope in the series which is one positive thing that the listener and a true fan of the series have to admire.
