Mona returns to Rosewood in a very fragile state as she must answer to the police for faking her death. Matters only get worse when she is confronted by Lesli’s sister about Lesli’s inadvertent involvement in Mona’s plot. Hanna is determined to help Mona out, not only to reassure her she is safe from Alison but also to try and repair Mona’s friendship with Lesli. Emily tries to help Sara with her troubled home life by encouraging her to explore the possibility of emancipation. Spencer, on the other hand, finds help from someone from her past.
Meanwhile, Alison grows closer to Lorenzo as she looks for support outside of her family.
Jane and Maura are called to the BCU "Body Farm" -- an academic research facility dedicated to the study of human decomposition -- when a murder victim is found buried in a shallow grave among the research corpses. Angela also has secrets she is keeping buried from Jane.
After a Cyber-bullying video goes viral, the creator of the video and her boyfriend are murdered. While a group of friends mourn their friends' death they also fear that the murder's were done by a copy cat of a murderer twenty years before or maybe even the original killer himself.
When the algorithm for the Stitchers program turns up among thousands of classified documents hidden by a conspiracy theorist, Kirsten starts to suspect her colleagues. Meanwhile, Kirsten starts getting cryptic messages from an unexpected source.
Jackson Oz, an American ex-pat safari guide living in Africa, discovers a link between strange animal attacks on people occurring around the world and his late father's controversial theories about an impending threat to the human race. Meanwhile, journalist Jamie Campbell and veterinary pathologist Mitch Morgan team up to investigate similar abnormal animal behavior in Los Angeles.