The Grand Babylon Hotel is an exclusive London establishment, and American millionaire Theodore Racksole, visiting the hotel with his spirited 23-year-old daughter Nella, decides to buy the place. What he hasn't counted on is having to deal with a criminal conspiracy whose purposes are not at all clear, and events take an unexpected turn as Theodore and Nella play detective. Replete with evil villains, physical dangers, and secret passages, The Grand Babylon Hotel is a mesmerizing thriller that will be enjoyed by mystery lovers everywhere.