This film is based on Alister Maclean's novel. John (Michael Dudikoff) is a professional explorer who, by nature, willing to accept the challenge, decides to go deep into the Amazon jungle to find the rumored lost city. He was accompanied by a group of people from different backgrounds, each with his own reasons to participate in the jungle trip, but the goal was the same-to find the buried treasure in the lost city. However, there was a Cheng Yaojin on the way, and a Nazi doctor who experimented on a human body made the journey into a journey to hell.