Clayton Jessup, a deranged killer who targets happy families, is on the loose and looking to kill again, sending the team on a manhunt to stop him. Bex learns who she can and can't trust.

Dr. Ezekiel Malak, a hospital psychiatrist turned deranged killer, is prowling for new victims in Chicago, so Bex and the team work to find a method to his madness in a desperate bid to get ahead of him — until Malak makes a move no one saw coming.