The Interfaith Room, Gate 47

The interfaith chapel at Terminal C has no chaplain — budget cuts, 2019 — but it does have a logbook chained to the lectern, and Marguerite, the 61-year-old overnight custodian, reads it every shift while she mops. Passengers write to a God they assume is staffed. Most of it is flight anxiety. But over eleven months she notices one recurring hand — tight, left-slanted, always blue ink — that has been describing, in escalating detail, a murder the writer intends to commit in a city he keeps refusing to name.

1. Marguerite starts answering. Not as God — she's not crazy — but she buys the same blue pen and writes beneath his entries in the margin, small, like a footnote: practical objections. *She'll be missed by her sister.* *You'd need a car you don't own.* He writes back. A correspondence forms in a book that legally belongs to the Port Authority, conducted by two people who have never seen each other, in a room with a rotating prayer rug and a plastic Torah ark bolted to the wall.
2. Airport ops decides the chapel is underused square footage and schedules it for conversion into a nursing suite in ninety days. The logbook is slated for the shredder. Marguerite realizes she has a deadline, and that he does too — his entries accelerate, as if the room closing is a verdict. She begins pulling the terminal's overnight camera footage through a friend in Lost & Found, cross-referencing who enters the chapel against the dates of the blue-ink entries, and finds that the writer is not a passenger. He badges in through the employee corridor.
3. The match is Denny, 34, de-icing crew, who has brought her coffee every winter for six years and once drove her to a funeral in Utica. Confronting him would end the correspondence, and the correspondence is the only thing slowing him down — every objection she writes buys a week. So she does the unbearable thing: she keeps mopping, keeps smiling at the coffee, and keeps writing to him as a stranger, inventing new obstacles, stalling a man she now has to look in the face at 4 a.m.
4. With three days left before demolition, Denny writes that he's booked the flight — one way, tomorrow, and he thanks the margin-voice for the delay, because the delay let his daughter turn nine. Marguerite understands she has been read too: that he has known who she was for months, that he chose the chapel because she cleaned it, that he was never writing to God.

💡 The engine is a confession booth with no priest — an anonymous two-way channel in a room designed for one-way speech — so every attempt to stop a murder deepens the intimacy that makes stopping it impossible, and the reveal reverses which side of the conversation the reader has been standing on.