Head Maid Molly Gray navigates the polished corridors of the Regency Grand Hotel with pride, maintaining meticulous order and silence. Yet, the hotel's tranquility is shattered when a renowned mystery writer and past acquaintance of Molly meets a deadly fate in the tearoom. Encircled by swirling suspicions and the hotel's soiled reputation, Molly delves into her own dusty memories, untangling secrets tucked away in her mind. In Molly's hands lies the key to solving a grim riddle entwining her own history with that of the deceased guest. 'The Mystery Guest' is a tale of vigilant observation, unexpected connections, and the unearthing of truths between the lines of Molly's past and present.