When the owners of a meat company are brutally murdered, Agent Kate Moretti goes undercover to investigate an animal rights group suspected of foul play. Meanwhile, as Pierce helps solve the case, he considers making a deeply personal confession to Kate.

After a student is found murdered, Pierce tries to find the killer while defending the victim's boyfriend, who is believed to be mentally ill and guilty of the crime. Meanwhile, Pierce must confront his feelings as Kate and Donnie prepare for their wedding day.