When a mysterious physician summons young Dr. Hartley to attend a patient shrouded in secrecy, he finds himself drawn into a web of deception at Number 31 New Inn. The patient is hidden away—his identity concealed, his condition strange and troubling. Why must he remain invisible? Who profits from his isolation? As Hartley probes deeper, an inexplicable illness, a vanished heir, and a forged legacy slowly come to light. With the brilliant medico-legal detective Dr. Thorndyke at his side, Hartley races to unravel a chilling conspiracy—before the truth dies with its last living witness.
