"An ISIS-style beheading of a journalist, carried out by a New York City group pledging fealty to that rogue state, becomes more than just another case for NYPD Captain Nikki Heat when the killers announce their next target: her husband, magazine writer Jameson Rook. Meanwhile, Heat is haunted by a fleeting glimpse of someone she swears is her mother... a woman who has been dead for nearly twenty years" -- provided by publisher.

One night, New York FBI agent Aiden Mahoney receives a visitor in a dream, an old friend named Richard Highsmith. The very next day he's sent to Sleepy Hollow because Richard's gone missing there. Maureen "Mo" Deauville now lives in the historic town and works with her dog, Rollo, to search for missing people. She's actually the one to find Richard, or more precisely his head, stuck on a statue of the legendary Headless Horseman. Mo and Aiden, a new...

A young boy witnesses the beheading of his father, so he sets out to recover his father's head and find the man who betrayed his father to the authorities.