Red code. It’s 1895, and after the suicide of her mother, 16-year-old Gemma Doyle is shipped off from the life she knows in India to Spence, a proper boarding school in England. Lonely, guilt-ridden, and prone to visions of the future that have an uncomfortable habit of coming true, Gemma’s reception there is a chilly one. To make things worse, she’s been followed by a mysterious young Indian man, a man sent to watch her. But why? What is her destiny? And what will her entanglement with Spence’s most powerful girls—and their foray into the spiritual world—lead to?