Economically utilizing the Universal Studio itself as a "set," is a murder mystery centered in the film capital. The story concerns a long-unsolved homicide case involving several silent-film stars (an echo of the William Desmond Taylor scandal of 1922). Producer Richard Conte decides to make a movie based on the case, and to this end rounds up its surviving participants, including a once-great star/director (Henry Hull) reduced to bit parts. The denouement holds no surprises for mystery fans, but is effectively staged by director William Castle. is given the aura of verisimilitude by the presence of several silent-movie celebrities (including William Farnum and Francis X. Bushman) as "themselves." Also appearing in an unheralded bit part is Elmo Lincoln, moviedom's first "Tarzan."