When a mysterious threat reenters the lives of twins Ben and Sheere, separated as babies and reunited as teenagers in 1930s Calcutta, the siblings must confront an unspeakable terror, with the help of their secret society of fellow orphans.

"1907. On the eve of her fifth birthday, Poppy Pendleton is tucked safely in her bed, listening to her parents entertain New York's gilded society in their Thousand Islands castle; the next morning, she is gone, and her father is found dead in his smoking room. 1992. Though Chloe Ridell lives in the shadows of Poppy's castle, now in ruins, she has little interest in the mystery that still captivates tourists and locals alike. She is focused on preserving...