Plot summary
One month later, Ichabod continues his frantic search for a way to find Abbie. While searching, he accidentally summons a demon that feeds on desperation and receives messages indicating Abbie is still alive. With the help of FBI agent Sophie Foster, Ichabod prevents the demon from killing Reynolds, who is grieving Abbie's disappearance, and traps it in an enchanted mirror where it is subsequently destroyed. Using a piece of her broken box, Pandora activates a beacon that draws all of the world's demons to Sleepy Hollow. Abbie wakes up in another world.
Credits
Adapted from Wikipedia contributors, Sleepy Hollow season 3. HTML formatting and reference markers removed.