Still posing as James, John is taken to Bryce Manor, where a corporate team-building weekend has produced a missing-person puzzle. Peter Williams, one of the delegates, cannot be found. The other guests offer an untidy mixture of exercises, quarrels and movements around the stately home, while the motivational speaker tries to preserve the event's artificial good humour. Police initially have to ask whether Peter has left voluntarily, suffered an accident or been harmed somewhere on the estate.
The biographies make the gathering stranger. Nearly everybody attending, apart from the speaker, has a criminal record or has been associated with a scam. Their shared history gives several people a reason to fear Peter and makes a private conspiracy more plausible than a random disappearance. John studies the house as closely as the statements. An urn has been conspicuously cleaned; the wallpaper and security images do not align as they should; and the group's timetable contains gaps that cannot be explained by innocent team exercises.
John realises that Peter never departed Bryce Manor. During a confrontation, several delegates attacked or shoved him, and his head struck the urn. The death implicates the group rather than a lone mastermind. Lady Bryce then helped turn panic into concealment: a section of wall was rebuilt around the body, while Peter's car was placed near a cliff to manufacture the story that he had driven away and perhaps died elsewhere. The altered wall and the supposedly incidental cleaning expose the physical work required after the confrontation.
The resolution also explains why the witnesses' accounts almost fit. Each person can describe a portion of the weekend truthfully while omitting the shared assault and cover-up. John reconstructs their collective sequence, demonstrates that the house itself has been changed and forces the group to face the fact that Peter's absence was staged. The motivational speaker is the exception: surrounded by criminals and victims, he is not part of the fatal act. What first resembles a country-house vanishing becomes a body-hidden-in-plain-sight case.
At home, Lucy and John continue reading James's notebook. A missing page yields an impression when they rub the sheet beneath it, revealing the names Sinclair and a fragment that points towards Ziegler. Material hidden in an old fax machine further connects James to the Sinclair investigation, a case that appears restricted inside the police system. Henry sees the adults' improvised inquiry becoming more serious, while Lucy recognises that James was following a story powerful people wanted contained. John returns from Bryce Manor with his cover intact, but the family now understands that the notebook is mapping a dangerous official trail.
Police searches outside the manor initially support the idea of a voluntary departure because the staged vehicle draws attention away from the building. John instead asks what the delegates collectively avoid describing. Their efforts to preserve the seminar timetable reveal how much coordination occurred after Peter was hurt. The brickwork and decoration could not have changed by themselves during an away day, and the scrubbed urn is meaningful precisely because other objects remain untouched. Lady Bryce's authority over the property makes the concealment practical, while the delegates' shared exposure gives them a reason to accept it. The case is solved when the house is treated as something the witnesses edited, not merely the background to their statements.