After another spat with her kids, Dona Hermínia decides to take some time off from them and hides away in her aunt's house, where she reminisces about her kids in an age when they still needed her.
André is a young doctor who, after spending a year working in Africa, discovers that he has been exchanging letters not with his long-time girlfriend, but with someone very close to her.
Twelve people are confined together in an abandoned maximum security prison in the middle of the Amazon forest, and end up having to fight for their lives against unknown creatures and supernatural odds.
