Unable to process the death of his daughter, Detective Boyd embarks on a hunt for a serial killer who murders according to a brutal tribal ritual: Muti. The only person who can help Boyd is Professor Mackles, an anthropologist who hides an unspeakable secret. The line between sanity and madness thins as Boyd goes deeper into the killer’s world.

A teen winds up in over his head while dealing drugs with a rebellious partner and chasing the young man's enigmatic sister during the summer of 1991 that he spends in Cape Cod, Massachusetts.