The Andersen family moves to their newly refurbished home in Village Du-Nu. Grace and her sister discuss the Stevenson family history with all the kids, including their grandfather who went missing twenty years earlier. No one knows where Samuel Stevenson is, or even if he is still alive. Jeremy decides that he needs to look into the disappearance, and brings his friend Charlie along to help him look into the mystery. They begin investigating at the missing grandfather’s cabin, in the north end of the valley, and become worried when they find out that a wolf is following them around the valley. The conclusion to the mystery reveals not only where Samuel disappeared to, but also an unbelievable secret which they must swear to secrecy.