Elena and Clay take on a deadly new foe to save Marsten; Paige and Nick try to find the cause of Rocco's magical outbreaks; Katia tries to save her family.
A local maskmaker is targeting Wesen to create Luchador masks that bestows great power to its wearer. As Nick, Hank, Monroe and Rosalee work to stop the killings, Capt. Renard considers an offer that will bring him closer to claiming his destiny. Meanwhile, Eve's further investigation of a recent incident raises new questions.
Pritchard and Duval continue to investigate who Albert Lin really is, who created him and try to uncover how he is involved in a string of murders. The investigation drives a wedge between Mary and Otto, and Otto must choose if he will betray Mary and undo everything they have built, including Pritchard to align himself with Connor Graff. Meanwhile, Gracie goes missing and Pritchard and Duval must race against the clock to rescue her before Pritchard’s time runs out.
After a supernatural event takes the Witnesses by surprise, both Crane and Abbie are forced to work alongside their most hated foes yet. Meanwhile, Jenny and Joe struggle to salvage their relationship, as they continue to battle their own internal demons.