Brears and Lamper, two young and cocky FBI agents, investigate a fresh series of ritual murders somehow tied to the final undercover assignment of Aldo Sax-- the once golden boy of the Bureau, now a convicted killer and inmate of a maximum security prison. From their interrogation of Sax (where he spoke exclusively in inhuman tongues) to a related drug raid on a seedy rock club rife with arcane symbols and otherworldly lyrics, they suspect that they are on the trail of something awful-- but nothing can prepare them for the creeping insanity and unspeakable terrors they will face in the small harbor town of Innsmouth.