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?

When Reynolds heads to D.C. to discuss developments in the Nevins case, Abbie is left in command. Jenny and Joe deal with unexpected consequences as a result of stealing the shard, which leaves both the lives of the heroes and Abbie's career in great peril. Meanwhile, a new, more dangerous evil force is revealed.

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.

When Jenny makes the decision to confront her father, family turmoil from the past rises to the surface. Meanwhile, Atticus Nevins returns to town, bringing more danger than the FBI could have imagined.