When Pandora unleashes an iconic monster to haunt the residents of Sleepy Hollow as they sleep, Abbie and Jenny are tempted to confront a painful part of their past. Meanwhile, Abbie makes a crucial decision for her career and Crane does his best to guide her with wisdom from his own experiences. Will Ichabod lead Abbie to the right decision?

In the aftermath of Jenny and Joe's run-in with Sophie, Abbie is in deep water with Reynolds. Meanwhile, the Witnesses deal with lasting implications of the shard and find themselves in grave danger as they come face-to-face with a greater evil than they could have imagined.

With a single day left before The Hidden One regains omniscience, Abbie and Crane must do the unthinkable in a last-ditch effort to save the world. Meanwhile, Jenny, Joe and Sophie devise a plan to stall as the Witnesses work.

After a startling discovery, Abbie and Crane realize what they must do in order to make Pandora’s box complete again. Meanwhile, the team works tirelessly to stop The Hidden One, before he destroys all of humanity. Can the Witnesses succeed with the fate of the world in their hands once again.

After a big discovery, Crane and Jenny struggle with breaking some difficult news to Diana. Meanwhile, the team learns that there may be witchcraft involved in a new case. Can Crane find a way to tell Diana what he knows? .

When the team realizes that the talisman which Dreyfuss seeks might be hidden in the most obvious of places, they race against the clock to find it before the evil forces are aligned. Then, with heightened emotions and bittersweet memories, Jenny and Crane revisit important parts of their past as they return to Sleepy Hollow.

Dreyfuss finally garners enough power to infiltrate the White House, and his group of minions grow strong enough to take action. Can Team Witness stop Dreyfuss in time?