A New York librarian is discovered unconscious in a park with no memory, in a mystery that challenges consensual reality

We first meet Jane O in the consulting room of Henry Byrd, a New York psychiatrist. Jane, a 38-year-old librarian, is neat, quiet, outwardly unremarkable. She sits without saying anything, then gets up and leaves. Her visit has lasted just 14 minutes and Henry fears he will not see her again. He detects in her “a loneliness of the soul … [like] a pine tree growing alone on a great, wide plain”.

Their next encounter proves even stranger. Jane has been discovered unconscious in a public park with no memory of how she got there. A day of her life has gone missing and she is anxious about the welfare of her young son Caleb, who she failed to collect from nursery during her “blackout”. Terrified about how she might be judged for this memory lapse, she finally gives an account of the inexplicable event that brought her to Henry in the first place.