Yet another soldier in the army of evil, the Sandman, seeps into the dreams of the residents of Sleepy Hollow. By infiltrating their minds at night, he tortures them to the brink - all because they, at one time, turned a blind eye to justice. When the Sandman seemingly sets his sights on Abbie, she is forced to begin to face her past - and her institutionalized sister, Jenny. With Ichabod by her side, and her life at stake, the duo must try to defeat the Sandman and continue their fight against evil.

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.

The battle between good and evil comes to an explosive head.

Picking up immediately after the spellbinding events of the Season One finale, Ichabod finds himself buried alive in a coffin; Abbie is trapped in purgatory; Ichabod's wife, Katrina, has been kidnapped by the Headless Horseman; Capt. Frank Irving is behind bars for a murder he did not commit; and Abbie's sister, Jenny, is among the wreckage of a horrific car crash. These events were due, in large part, to the shocking revelation that Henry Parish, the trusted friend of Ichabod and Abbie, is actually Ichabod and Katrina's son and the Second Horseman of the Apocalypse. Now, with Henry's emergence as the Horseman of War, alongside the Headless Horseman.

Sheriff Corbin's son returns from war, but his strange behavior leads Abbie and Ichabod to question his intentions.

Abbie and Ichabod are on a quest to find a weapon of ultimate power to kill Moloch - the Sword of Methuselah - before the Headless Horseman can stop them.

Unforeseen sacrifices must be made and loyalties are put to the ultimate test in the fight against evil.

Abbie Mills receives a message from Ichabod Crane after not hearing from him for several months. They now become aware of a new evil that must be addressed, and join forces with old friends to face this new threat to Sleepy Hollow.

Abby and Agent Foster go on a two day FBI survival training course and encounter one of the creatures summoned by The Hidden One. Crane attempts to find out more about the symbol from the world Abby was trapped in.

Crane and Abbie need to cooperate with their most detested foes when a supernatural event shocks the witnesses. Joe and Jenny try to restore their relationship.

Ichabod and Jenny return to Sleepy Hollow to find the talisman before Dreyfuss does.