“Milo” (Michael Caine) arrives at the stately pile of a renowned crime writer - a sort of male Agatha Christie, and has to navigate a complex maze to track down his voice. The dapper “Andrew” (Sir Laurence Olivier) welcomes his guest effusively and takes him into his home. It’s an Aladdin’s cave of theatrical props and costumes which leaves “Milo” a little unnerved. Not as unnerved as he’s going to get, though, when…