James Robertson Justice, Edward Underdown and Henry Kendall are implicated in an unsolved murder. the victim was a beautiful secretary on intimate terms with the suspects. Justice, a waspish author married to long-suffering Valerie Hobson, is the most suspicious of the bunch. As the case unfolds, one of the three suspects becomes the target of a murder plot himself. The culprit could be the most timid of the trio, but that would be too easy for the scriptwriters--or would it? Murder Will Out was originally released in Britain as The Voice of Merrill.