Field procedure
- 01
Reach the third floor of Devil’s Reef Hotel and enter Room 301.
- 02
Interact with the safe and enter 2–1–3–7.
- 03
Take the contents before leaving the hotel if you are clearing optional investigation rewards.
How the clue resolves
The nearby letter and song reference resolve to the four digits. This page keeps the direct answer separate from the clue explanation so players can choose how much context to reveal.
This file is currently marked source-checked. It records cross-checked launch-window sources; it does not claim first-hand playtesting until that status is explicitly shown.