Thanks to his Aunt Pearl, twelve-year-old Sammy is stuck in the Catskill Mountains for the summer with his awful cousin Joshua. While he doesn’t relish the idea of getting to know his new stepmom, at least he’d have his gang to hang out with in New York if he got to stay there instead. But when Sammy realizes he was brought on to be hired help at the hotel, he makes the most of it and enjoys bunking with his teenage co-worker, Adam. Trouble seems to follow Sammy as he becomes entangled in a series of mysterious occurrences, including a terrifying headless horseman who seems to be haunting the reclusive Hermit at the top of the neighbouring hill. Sammy and his new friends form a team called The Ichabods to crack the mystery. Set in the early 1920s, after WWI.