As “A” doubles down, the friends must work quickly to uncover the link between Angela Waters’ death, their mothers, and their mysterious foe… before it’s too late.

Despite coming clean about “A,” the friends find their troubles are far from over – especially as the results of the group’s clandestine blood drive push Tabby towards a new suspect.

The friends work together to uncover Imogen and Tabby’s assailant during the Annual Thanksgiving Millwood High Blood Drive. Later, Sidney confronts Tabby about her secrets.

As the PLLs plan Mouse's surprise sixteenth birthday party, Tabby and Imogen face boy problems, Noa clashes with Jen and Faran spills her secret.

After their punishment comes to an end, the girls cement their friendship when Imogen needs them most.

The PLLs await the results of A's trial and a much-needed break – only to be cursed with a fate worse than death ... summer school.

The PLLs take a final stab at their list of suspects, and through a harrowing night will discover the identity of Bloody Rose Waters once and for all.

In 1999, a group of friends is rocked by the sudden death of one of their own. Twenty-two years later, their daughters are pushed together by a mysterious foe.

Still shaken from her encounter with Bloody Rose, Mouse searches for the real Rose Waters. Meanwhile, Imogen keeps tabs on Dr. Sullivan, Tabby works on a new short, Noa takes a much-needed day off, and Faran’s strength is put to the ultimate test.

After discovering that Kelly's church is using her former home for their disturbing "Hell House", Imogen springs into action, while Mouse and Ash plan a Pride pool party in protest. Later, the PLLs' plan to freak out the faithful takes a frightening turn.