Trevor Blackburn is accused of murdering his girlfriend, Faith, in a brutal ritual. He's sentenced to live in an experimental rehabilitation community and falls into a coma. When he wakes up, he meets the mysterious Dr. Ek, who tortures Trevor in an attempt to learn the whereabouts of a powerful occult book. As other patients start to disappear, Trevor begins to wonder who and where he really is.
An elite team of FBI profilers analyze the country's most twisted criminal minds, anticipating their next moves before they strike again. The Behavioral Analysis Unit's most experienced agent is David Rossi, a founding member of the BAU who returns to help the team solve new cases.
A team of dedicated amateurs work on cases involving unidentified victims. After the police have given up, this group must first solve the puzzle of the victim's identity in order to then help catch the killer. They work to give the deceased back their names, lest they become—The Forgotten.
