Innsmouth: a crumbling Massachusetts seaport shadowed in rumor and suspicion. A town inhabited by sullen and hostile people with disturbing, amphibian looks. It’s no place for a sightseer. Passing through Innsmouth on a genealogical tour of New England, a young man makes an ill-advised attempt to unravel the town’s long-veiled history. What unfolds is a terrifying tale of a town transformed by its interaction with a monstrous aquatic civilization. As Innsmouth’s murky history is brought to light, the narrator learns that the town’s mysterious past is tied to his own family history. It is a revelation that has chilling consequences for the present—and for the future.