The Halloran rooming house is still smoking when Investigator Edda Voss arrives at dawn. Eight survivors sit on the curb under scratchy blankets, faces black with soot. The landlord's ledger lists nine tenants, nine rent stubs, nine keys collected every New Year. Edda counts the survivors twice. Eight. So where is the ninth tenant, and which clue does she chase first?

Edda steps over the warm threshold and into the burned house. The fire crew waves her back, but she pushes upstairs to room 9. The door is locked. She tries each of the eight keys the landlord saved. None of them fit. The ninth key is gone.

Edda gets the fire chief to break the lock. Inside room 9 the air is cold and stale, like the fire skipped it on purpose. On the wall hangs a calendar from eleven years ago. Every day is crossed out up to one date in October. After that, nothing.

Edda pulls open the closet under the dead calendar. Inside, neatly folded, are eleven years of birthday cards, all addressed to Dahlia, all unopened. One card a year, eight signatures each. They kept writing to a woman who never came to read them.

Edda reads the newest card, dated this year. The last line is different from the rest: 'We're sorry. We're finally telling.' Below it, all eight signatures, and a confession that Dahlia is buried in the garden. They were going to come clean today. The fire beat them to it.