A study on surveillance videos showing the last sighting of missing people. The film is structured as a long walk through the city in which the exit from the scene corresponds to the total disappearance of the person. Sometimes the subject is more evident, other times it mingles in the crowd or appears in a few pixels in the distance. The edges of the picture are also the limits of the image, which can be easily crossed but which, in the case of these videos, become openings to the unknown.