Three rival actresses team up to solve a murder at the stately home of the author who made them famous - only to discover the solution lies in the stories themselves.

In attendance: the VIP fans, staying at Aldermere; the fan club president turned convention organiser; the team behind the newest movie adaptation of Davenport's books; the Davenport family themselves - and the three actresses famous for portraying Lettice's 1930s detective, Dahlia Lively. National treasure Rosalind King, from the original movies. TV Dahlia for thirteen seasons, Caro Hooper.

And ex-child star Posy Starling, fresh out of the fame wilderness (and rehab) to take on the Dahlia mantle for the new movie. Each actress has her own interpretation of the character - but this English summer weekend they will have to put aside their differences, as the crimes at Aldermere turns anything but cosy. When fictional death turns into real bodies, can the three Dahlias find the answers to the murders among the fans, the film crew, the family - or even in Lettice's books themselves?