Posy, Caro, and Rosalind have all played Dahlia Lively on the big screen: the lovable yet irascible detective from Lettice Davenport's Golden Age mystery novels. But when all three actresses receive blackmail letters before a promotional event for the new movie, the convention organizer disappears, and an attendee suddenly dies (mysteriously replicating one of Lettice Davenport's murder scenes), they learn it takes a lot more than arch commentary and a raised right eyebrow to solve a crime. (RR)