Nine months after Abbie Mills and Ichabod Crane parted ways, they reunite when Abbie, now an FBI agent, returns to Sleepy Hollow to release an imprisoned Crane. The two Witnesses face all-new dangers, including a demon who kills anyone with a dark secret, an undead army, and a horrifying beast with ties to Jenny Mills. But the arrival of a mysterious woman named Pandora brings the most terrifying threat of all. After she uses Abbie and Crane to resurrect "The Hidden One", a seemingly invincible god, the fate of the world hangs in the balance, leading to the series' most shocking climax so far.