A sundry group of Western expatriates find themselves "treated" to an impromptu stay at the Shanghai Waldorf courtesy of the Red Chinese government, which is looking to ferret out a spy in their midst. Will the informant be revealed and punished...and, if so, will any of his jaded and cynical fellow guests take up his cause? Crackling thriller stars Edmond O'Brien, Ruth Roman, Richard Jaeckel, Whit Bissell. 90 min. Widescreen; Soundtrack: English Dolby Digital mono.