Five vacationers and two crewmen become stranded on a tropical island near the equator. The island has little edible food for them to use as they try to live in a fungus covered hulk while repairing Kessei's yacht. Eventually they struggle over the food rations which were left behind by the former crew. Soon they discover something unfriendly there...

In the depths of an ancient forest, something has been growing. Something older than humanity itself, and perhaps greater too. When a park ranger discovers a man and his son living wild, she stumbles onto a secret that is about to change the world.

A woman leads an expedition into a remote jungle to find her long-lost brother, but instead finds a mad scientist who has created a fungus monster that feeds on the local inhabitants.