Kathy Austin works for British Intelligence just after World War Two, and travels the world to investigate unexplained phenomena. On the trail of the bizarre, potentially alien creature photographed in Brazil, Kathy Austin has reached the isolated mission where the photographer died. Unfortunately, the road forward leads into the heart of the rainforest and the territory of extremely hostile natives. Continuing will be difficult and dangerous, especially as she appears to be followed by a number of people including two suspicious Germans and the Brazilian Navy!