In 2023 unidentifiable radiation left 99.5% of the world's female population sterile. Man's fate is now divided in to two paths: extinction or the beginning of a new dawn.
On the eve of August in Turin, Italy. The city is devastated by a series of murders, which take place on the sets where the films of Dario Argento were shot. The police suspect that the culprit is a scholar of the "Master of the Italian Giallo". The manhunt is on.
Marcello is a professional film restorer and an avid cinephile. While working on some of the most popular titles of Italian cinema, he comes across a strange figure almost hidden among the extras - a man wearing a bowler hat and looking directly toward the camera, perhaps even at Marcello himself! He finds the same man in many other films from different movie ages. He grows obsessed with this figure, even if it seems Marcello is the only one who can see him.