As Halloween approaches, Chanel creates a devious plan after Zayday makes a shocking announcement. Meanwhile Grace and Pete pay a visit to a mysterious woman with ties to Kappa's past. Also, Hester grows closer to Chad, Denise continues her search for the red devil killer and Dean Munsch does everything in her power to keep Wallace University open.

Shocking confessions are made as the Red Devil is finally unmasked and the killer revealed.

A new patient with a hideous ailment visits the hospital in hope of a cure, but finds a love interest instead. Meanwhile, Chad returns to win Chanel back and, in the process, discovers a dark secret of Brock’s. Then, after another run-in with the killer, Munsch enlists the help of new Quantico special agent Denise Hemphill.