Seven-Day Murder Mystery: The Locked-Room Killer

Twelve people were invited to an in-person murder mystery game, only to be trapped in a sealed room and forced to begin the "Seven-Day Trial of Truth." An antique dealer, a former detective, a suspense novelist, and the others each had their own secrets. Every day, they had to solve a murder to stay alive. Suspicion and killing intertwined as a conspiracy behind the "scripted game" emerged. Would they all perish, or would someone escape with the truth?