"For Annie's tenth birthday, her papa gives her a pad of paper, some colored pencils, and the Klimas family secret. It's called the nuodeema burna, or eater of sins. Every time Annie misbehaves, she has to write down her transgression and stick the paper into a hidey-hole in the floor of their house. But Annie's inheritance has a dark side: with each paper fed to the burna, she feels less guilty about the mean things she says and does. As a plague...

"1919. Mama is ill. Father has taken a job abroad. Nanny Jane is too busy to pay any attention to Henrietta and the things she sees - or thinks she sees - in the shadows of their new home, Hope House. All alone, with only stories for company, Henry discovers that Hope House is full of strange secrets: a forgotten attic, ghostly figures, mysterious firelight that flickers in the trees beyond the garden. One night she ventures into the darkness of Nightingale...

A clue takes Amy and Dan Cahill to Egypt, where they investigate the origins of the rivalry between the Tomas and Ekaterina branches of their family and try to figure out if they can trust a message from their dead grandmother Grace.