The VCU team tracks a serial killer who bites the fingernails off his victims, while Web, who is under investigation, uses his own methods to find the suspect.

When pregnant women are founded murdered with their unborn babies missing, the VCU team tracks a killer who may be trying to replace her own miscarried child.

The VCU team investigates a spate of deadly fires that point to a lovelorn arsonist and trigger painful memories of Rebecca's childhood abduction.