The legend of Eldorado says that death awaits everyone who dares to set foot on this land. However, this does not frighten zoology professor Helen Zachary, because she is not attracted by gold or other riches, but by the opportunity to find creatures unknown to science. So, an expedition led by Professor Zachary goes to the shores of the Amazon and... goes missing. A special squad has been sent to search for her. What exactly will they find in Eldorado and what forces will they have to resist?..