A women's prison camp is located deep in the tropical rain forest. Sadistic guards and a warden from hell make life almost unbearable for the inmates, and any infraction of the rules is dealt with swiftly and savagely. The camp doctor is horrified at what he sees happening, and drinks heavily to push the horror away. Finally the inmates have had had enough, and they enlist the help of the doctor to try and escape.

Vanessa, a television reporter covering a story of a farmer attacked by his chickens, discovers that this is not an isolated incident. Travelling to Spain with her cameraman Peter, the two discover the survivors of a town wiped out by the birds thirty years ago. Meanwhile, attacks continue as a child's birthday party ends in tragedy and doves devour a poultry farmer and his wife. Vanessa soon comes to the conclusion that the birds are organizing themselves against the ecological ravages of man, but time is running out as thousands of birds launch an attack against a train Vanessa is traveling on.