Recovering from being shot by a student she'd never met, Chicago sociology professor Amelia Emmet, desperate to know why she was targeted, gets some investigative help from her teaching assistant and together they must live through the darkest hours of their lives to find the truth.

Using her skills as a handwriting analyst to assist a local murder and kidnapping investigation, Anna identifies disturbing parallels between the crimes and her own struggles to protect her troubled teen son from her abusive ex.

"From the critically-acclaimed author of The Day I Died comes a terrifying twist on a locked-room mystery that will keep readers guessing until the last page. Only in the dark can she find the truth. Since her husband died, Eden Wallace's life has diminished down to a tiny pinprick, like a far-off star in the night sky. She doesn't work, has given up on her love of photography, and is so plagued by night terrors that she can't sleep without the lights...