L'énigmologue Jeremy Logan est mondialement connu pour sa capacité à résoudre l'insoluble, à expliquer l'inexplicable. Appelé par l'institut de recherche Lux, situé dans un vieux manoir de Rhode Island, il doit enquêter sur la mort de Willard Strachey. Quelques jours avant son décès, cet éminent informaticien s'est comporté de manière incohérente, avant d'agresser son assistante et de se suicider de façon spectaculaire.Logan tente de retracer les derniers jours du savant, mais son enquête prend une tournure imprévue lorsqu'il découvre une pièce aveugle dissimulée dans une aile abandonnée du bâtiment, que Strachey avait été chargé de rénover. A peine y pénètre-t-il, qu'il est en proie à d'étranges phénomènes.

Yale professor Jeremy Logan is an "enigmalogist"--An investigator who specializes in analyzing phenomena that have no obvious explanation. Logan finds himself on the storied coastline of Newport, Rhode Island, where he has been retained by Lux, one of the oldest and most respected think tanks in America. Just days earlier, a series of frightening events took place in the sprawling seaside mansion that houses the organization. One of its most distinguished doctors began acting erratically -- violently attacking an assistant in the mansion's opulent library and, moments later, killing himself in a truly shocking fashion. Terrified by the incident and the bizarre evidence left behind, the group hires Logan to investigate -- discreetly -- what drove this erudite man to madness. His work leads him to an unexpected find. In a long-dormant wing of the estate, Logan uncovers an ingeniously hidden secret room, concealed and apparently untouched for decades. The room is a time capsule, filled with eerie and obscure scientific equipment that points to a top secret project long thought destroyed, known only as Project S. Ultimately, the truth of what Project S was -- and what has happened in that room -- will put Logan in the path of a completely unexpected danger.