Professor Augustus S. F. X. Van Dusen, known as The Thinking Machine, takes on an impossible case involving a haunted house by the sea.
The historic estate is plagued by a glowing phantom that terrifies visitors and leaves even veteran investigators baffled. Driven by scientific curiosity, the logician examines the strange occurrences, the architectural layout of the manor, and local legends surrounding a fifty-year-old murder. Ignoring superstition, he focuses on physical anomalies, optical illusions, and the hidden mechanics of human deception.
As the investigation deepens, the boundary between the supernatural and calculated fraud begins to dissolve. The narrative builds toward a confrontation with the mysterious entity orchestrating the ghostly phenomena. Ultimately, the professor unmasks the elaborate deception, proving that no mystery remains insoluble to the disciplined mind.
