Jungle explorer Jim Taylor agrees to lead an expedition to locate the source of gold and emeralds found in the Purus River, a tributary leading to the Amazon. Jim and his three assistants set off with twenty-five bearers, as well as the wealthy sponsor, rugged Craig Manners, owner of a pharmaceutical company. All does not go well as "El Tigre", the notorious bandit and kidnapper harasses them. The group rescues four hostages being held by El Tigre, a geologist, two sisters, and Martina, a woman of royal heritage. These extra individuals complicate the mission in many ways, not the least being the beauty of princess Martina. In the course of the trek, the group must also deal with a military outpost at the entrance to the rainforest and with the native Campa in the rainforest. This is a tale of sex and high adventure.