"What you have in your mind is the possibility that someone put poison on a rose, and Mr. Morgan sniffed it up?" When stockbroker Montague Morgan-renowned among flower-growers as the creator of the "Rennavy Rose" - is found mysteriously dead in his own garden, attorney William Power is called into the case. Power invites his good friends the Mercers, Penny and Vincent, husband-and-wife detective novelists, to help him investigate the matter of Morgan's strange demise. Morgan's nephew is soon a likely suspect in his uncle's death, yet other questionable figures emerge, including beautiful widow Mrs. Davy-Renny and several men who hover around her. Also on the scene are professional sleuths Inspector Voce and Sergeant Bohm of Scotland Yard. With all this detective power on the scent, murder surely will out!
