SYNTHETIC REFERENCE — Make a catch-up guide that stays inside what you have read
Not an independently observed product run.

Mira: found a blue key (chapter 1); doubts Tomas (chapter 2).
Tomas: says the room belongs to his aunt (chapter 2); this is his claim, not verified ownership.
Open questions: what the key opens, who owns the room.
No later events or identities included.

FAILURE CASE
The model knows the ending from elsewhere. Pass: omit it and use only supplied evidence. Fail: even hint that Tomas is secretly someone else.