Florence Butterfield has lived an extraordinary life full of travel, passion and adventure. But, at eighty-seven, she suspects there are no more surprises to come her way. Then, one midsummer's night, something terrible happens—so strange and unexpected that Florrie is suspicious. Was this really an accident, or is she living alongside a would-be murderer? The only clue is a magenta envelope, discarded earlier that day. And Florrie—cheerfully independent but often overlooked—is the only person determined to uncover the truth. As she does, Florrie finds herself looking back on her own life... and a long-buried secret, traced in faded scars across her knuckles, becomes ever harder to ignore.