A Call of Cthulhu scenario set in 1938 on a doomed flight over South America and the dangerous jungle in which the plane crash lands.
From the back cover:
"Welcome aboard Pan Caribbean Airways Flight 101
An archaeological conference...
A routine flight...
Thirty seconds of terror!
Now the passengers of Flight 101 are on their own, trapped in the green hell of the jungles of South America. Was their crash just an unfortunate accident? Are they truly alone in the jungle? There are worse things than the forces of the Cthulhu Mythos. Like a titanic green beast, the merciless, unforgiving rainforest harbors parasites, diseases, poisons, and thousands of terrifying beasts looking to make a meal of the weak and the lost. The passengers will have to work quickly and decisively if they have any hope that this will not be their Final Flight."