A macabre ritual murder puts Arkham PD detectives Jack Foster and Harvey Whitman to the test. As the investigation progresses, they will unveil a disturbing connection between the Salem witch trials of the 17th century and the end of humankind.

Detective Jack Foster rejoins the police department after a traumatic incident to take over the investigation of what appears to be mere political blackmail. Soon, however, he's faced with the discovery of a gruesome ritual murder that took place in a sealed room, from which no one could have gotten in or out without being seen. Along with his new partner, Harvey Whitman, an expert on cults, Foster dives deep into the shadows of the city of Arkham.

The case will get even darker when they find out it is related to three witches that escaped the Salem trials in 1693, and a conspiracy that could put an end to the world as we know it.