Justin Arnold's abrupt disappearance from his own mansion cuts his weekend festivities short. When local police are unable to locate him, a missing person case quickly becomes a murder investigation, and experts are called to his seemingly impenetrable estate. The sixth instalment of Carolyn Wells' 'Fleming Stone' series, this locked-room mystery is captivating, clever, and intricate - a must-read for those who enjoyed the impossible mystery of the 'Knives Out' movie.