A collector of old films acquires rare film and suddenly goes blind while watching. He calls his former girlfriend, police lieutenant Lucy Enebel, asking for help, and Lucy plunges headlong into the investigation of a strange incident. What is hidden behind these black and white shots? And why are unknown people hunting for the tape? The search comes to a standstill, and Lucy, in turn, turns for help - to Commissioner Charcot, an experienced analyst. As the investigation progresses, the story of the creation of film is overgrown with incredible details. The same mystery appears to be hidden in a Cairo slum and an orphanage in Montreal.