Confined to an insane asylum for a crime he claims he didn’t commit, underwear-clad inmate Salem (von Sydow) somehow manages to exact murderous revenge from beyond the sanitarium walls, while playing a game of cat-and-mouse with a police inspector (Howard) trying to unravel the head-scratcher. This “captivating, moody and scenic thriller” (The New York Times) co-stars fellow Bergman regular Ullmann.