While on her daily walk with her dog in the woods, a woman comes across a note and pinned to the ground by stones. "Her name was Magda. Nobody will ever know who killed her. It wasn't me. Here is her dead body." But in this darkly comic novel by the author of the National Book Critics Circle Award nominee Eileen, there is no dead body, and the woman becomes an unconventional detective in a quest to figure out who Magda was—or if she was ever anyone at all.