In a world where supernaturals and humans live side-by-side in peace, that peace can be suddenly shattered. That's when HSI (Human-Supernatural Investigation) comes into play.
Agent Aletta Sheridan has been with the department for only a little over a month when she's handed a new case. A murderer is on the loose in Isenton and it's her job to track the killer down.
Fiercely independent, Aletta is forced by her superiors to partner with another agent. With only a handful of clues to follow, will they be able to stop the killer before anyone else dies?