Jeff and Haila Troy again adding a certain debonair dexterity in their investigation of the death of a language teacher at a select New York school, which brings into question the fabrication of a false identity, the theft of a diamond pin, blackmail and several lying ladies. Jeff, never fooled by a pretty face, is ready with the answers, while Haila provides the final means of apprehension as she inadvertently is a come-on for the killer. Blithe -- lithe, too.