Elias Reed spends his nights transcribing therapy sessions for strangers-until one of them starts talking directly to him. At thirty-three, Elias has built a quiet life behind a keyboard, but when recordings from an unknown "patient" begin flooding his inbox, he discovers he's being studied, mimicked, and stalked by a man who knows far too much. What begins as a voice in his headphones soon becomes something far more invasive-something that knows where he lives, what he fears, and when he listens. Haunted by a voice that knows his every breath, Elias must decide whether to cling to reason or fall in love with the exquisite terror of being completely known.