Watch CineCalidad. A tribute to a fascinating film shot by Alfred Hitchcock in 1958, starring James Stewart and Kim Novak, and to the city of San Francisco, California, where the magic was created; but also a challenge: how to pay homage to a masterpiece without using its footage; how to do it simply by gathering images from various sources, all of them haunted by the curse of a mysterious green fog that seems to cause irrepressible vertigo…