Castor Grey is a formerly convicted serial killer, recently released, and currently working as a Medical Examiner for the LAPD. On the three year anniversary of his girlfriend's murder, Castor gets handed a case with a curious connection to his past. Someone is targeting surviving members of his own victims, and now he has to work with Detective Amara Valencia, his late girlfriend's sister to uncover the killer.The thing is, she's convinced he did it.