Deep within the enchanted woods in the town of Watch Hollow stands the once-grand Blackford House, whose halls hold a magical secret: a giant cuckoo clock that does much more than tell time. But when the clocks gears cease to turn, an evil presence lurking among the trees begins to come out of the shadows. When Lucy and Oliver Tinker arrive in Watch Hollow, they have no idea that anything is wrong. A mysterious stranger has made their father an offer...