Everyone in Walnut Grove knows about the big scary house on the hill outside of town and the man who lives there: Amos Pike.  Some would even say the place is haunted. And thanks to Nellie Oleson and a barking Jack, Laura is about to solve the mystery.  However, what she finds is a big old mess and a very grumpy old man who happens to have a few secrets of his own.   When the truth turns out to be more haunting than any old house, Laura must decided what is the best course of action to help her new friend.   What tough choices will Laura have to make?  Will Amos Pike turn his "haunted house" in to a dream mansion?  When will Nellie Oleson realize her teasing and taunts lack some imagination?