A group of students goes into the woods to study birds, and soon the dead begin to rise to devour the living.
Gianni is a political man with a good career waiting for him. Angela is his wife and she fakes an assault and a rape in a cinema. Eva is Gianni's lover and Angela's friend. Gianni and Eva decide to use the pretext of the assault to kill Angela. Later on Angela is blackmailed by a man who was present at her act. In the background there are Rosy, her maid always present, and a puzzling man who appears and disappears and makes strange phone calls.
When Olga Roli returns to her birthplace after a nervous breakdown, it quickly becomes much worse for her. Anonymous, threatening phone calls to deal with her as Olga O, her stage name from her time working in a local strip club, soon followed by a near miss with a murderous motorcyclist.
