"'Horizontal Boundaries' is a film that looks at certain aspects of the geography of California as the ground for cinematic disruption and restatement. The "Boundaries" in question turn out to be frame lines, the divisions between two images, one above the other on a strip of 35mm film. The projector gate is adjustable up or down in order to produce a single uninterrupted image: in this film the frame line is integrated into the compositional language of the piece. It is not a static repositioning, but rather a dynamic one, moving more or less randomly, causing image combinations to be generated unpredictably. The result is a tapestry of exquisite contradiction." - Pat O'Neill

The Ambassador Hotel in Los Angeles serves as the backdrop of Pat O’Neill’s artfully-crafted film. Shot in the classic Hollywood style, the movie follows various mysterious characters as they move through the haunted halls of the hotel, exploring along the way the secrets that are held within.