When a new reservation appears for a room that doesn't exist, hotel housekeeper Clara Dunn opens the door—and steps into her past. Inside Room 137 waits everything she's tried to forget: her husband's scent, his music, his death. As the days blur, the Hotel Penumbra begins to rebuild itself in impossible ways—blueprints changing overnight, corridors looping, mirrors whispering her name. Caught between sanity and obsession, Clara unearths a secret buried beneath the west wing: she was once the hotel's architect, designing a therapeutic memory maze to survive her grief. Now the structure has turned against her, demanding an ending. When the walls finally collapse, only one truth remains—grief isn't something you escape. It's something you clean, one room at a time. Fans of a literary ghost story about memory, guilt, and the long housekeeping of love.