Three things about Elsie

There are three things you should know about Elsie. The first thing is that she's my best friend. The second is that she always knows what to say to make me feel better. And the third thing... might take a little bit more explaining.
84-year-old Florence has fallen in her flat at Cherry Tree Home for the Elderly. As she waits to be rescued, Florence wonders if a terrible secret from her past is about to come to light; and, if the charming new resident is who he claims to be, why does he look exactly a man who died sixty years ago?