After being resurrected and pulled two and a half centuries through time, Ichabod Crane finds himself in modern-day Sleepy Hollow, where he quickly realizes that evil has awoken with him. When Sheriff August Corbin is killed by the infamous Headless Horseman, Ichabod forms an unlikely bond with Detective Abbie Mills, a young cop who has her own childhood supernatural experiences. Together, the two embark on a mission to stop evil and uncover mysteries dating back to the founding of our country. Captain Frank Irving hesitates to believe Ichabod's tales of supernatural evil. But when Ichabod's former wife, Katrina, provides clues about impending evil, they all begin to realize that this town is anything but sleepy.

Still adjusting to his 21st century reality, Ichabod Crane and Det. Abbie Mills move forward in their mission to unravel the mysteries lurking in Sleepy Hollow. A frightful vision from Ichabod's former wife Katrina, sends the unlikely duo on the hunt for a vengeful witch from the 1700s who has been awoken by unknown evils and is on a path of destruction in the quaint town. Meanwhile, despite all odds, Officer Andy Brooks is back and on a questionable mission of his own.

A doctor with ties to Abbie’s institutionalized sister, Jenny - and to the seminal supernatural event from their childhood - makes contact with the Lieutenant shortly before jumping from a ledge and plunging to her death. When a closer examination of the corpse reveals some intriguing and markedly paranormal signs, Captain Irving assigns Mills and Crane to investigate. Despite Abbie’s reluctance to revisit the unexplained and still contentious event from her and Jenny’s past, Crane forges ahead, leading to a guilt-ridden Abbie’s revealing confession that could hold the key to Sleepy Hollow’s current wave of mystical activity or – at the very least – offer clues to stem the growing rash of suicides by people considered “witnesses” to the Mills sisters’ mystery. When their investigation reveals the presence of an ancient Native American dream-demon, Abbie and Crane set out to confront the malevolent spirit on his home turf, knowing full well that should they be killed in the dream world, it would have real world implications.

Lt. Abbie Mills and Ichabod Crane search for Abbie's estranged sister, Jenny Tag Team, who has escaped from a Sleepy Hollow psychiatric hospital. In a game-changing episode, which includes flashbacks to the real Boston Tea Party, Abbie and Ichabod discover more about the evil they are facing... and finally learn its name in the haunting.

An unidentified boy is found unconscious by the woods’ edge, his veins blackened. During a brief period of consciousness, the boy – who is dressed in antiquated clothing – speaks in a language Crane recognizes as Middle English. When the EMT who revived the boy collapses exhibiting the same blackening of the veins, the CDC descends on Sleepy Hollow to contain what they fear may be the outbreak of an infectious and deadly disease. After speaking to the boy in his native tongue Crane concludes the lad is somehow linked to Roanoke, the first British colony in the New World, which mysteriously vanished over four hundred years ago. As doctors search for a medical cause and scientific cure for the growing epidemic, Crane and Mills follow the boy’s trail back into the woods in search for answers of an other-worldly nature. Meanwhile, when Captain Irving calls in special investigators from the NYPD to help with the ongoing "serial killer" investigation, egos in the Sleepy Hollow Sheriff’s Department get ruffled, leading an already suspicious Detective Morales to take a closer look at Crane; and despite her cynical disposition, Abbie begins to reconcile the fact that she has a major role to play in the battle against evil in Sleepy Hollow, and seeks out the help of a higher power.

When Ichabod Crane goes missing, his wife, Katrina, appears to Lt. Abbie Mills in a vision warning her that the Headless Horseman will return to Sleepy Hollow by nightfall. A frantic Abbie seeks help from the mysterious Henry Parrish, who holds vital clues about how Crane can vanquish his dangerous blood tie to the Horseman. Meanwhile, an encounter from Crane's past weighs heavily on him, and details about his first encounter with Katrina are revealed.

Abbie and Ichabod must find hidden clues to thwart the evil in Sleepy Hollow and Abbie gets an unexpected visit from the enigmatic Andy Brooks.

Ichabod, Abbie, Captain Irving and Jenny Mills join forces and face the Headless Horseman. While staring down this nemesis, Ichabod is shocked by game-changing information about the Horseman’s true motive.

When Ichabod and Abbie investigate a missing persons case, the search leads to a colonial-era house which holds secrets from Ichabod’s past...and unleashes a long-dormant evil.

Ichabod enlists Henry Parrish to help him communicate with Katrina, but in the process, a menacing danger is unleashed from purgatory.

When Capt. Iriving's daughter, Macy, becomes the target of evil forces, he makes a desperate plea to Crane and Mills for help, and seeks answers that lie within Washington's Bible. Meanwhile, a frightening chapter of Jenny's past is revealed.

Ichabod and Abbie discover a massive secret buried within the pages of George Washington’s Bible and unearth the shocking true nature of the founding father’s death. Meanwhile, Captain Irving makes a near-impossible decision for the sake of his beloved family that drastically changes his future.

The battle between good and evil comes to an explosive head – sacrifices must be made, worlds collide, loyalties are tested and the town of Sleepy Hollow will never be the same