Marple: The Body in the Library (2005)
A young woman's corpse is dumped in the library of Gossington Hall, home of Jane Marple's friend Dolly Bantry and her husband Arthur. Pompous Chief Constable Melchett suspects a connection with Basil Blake, an arty young man who lives locally but Blake is dismissive when Melchett visits him. Then Superintendent Harper rings from the coastal town of Danemouth. Ruby Keane, a young girl employed as a dancer at the Majestic Hotel there, has gone missing, and her cousin Josie Turner identifies the corpse as Ruby's.